Order Code RL31931
CRS Report for Congress
Received through the CRS Web
Climate Change: Federal Laws and Policies
Related to Greenhouse Gas Reductions
Updated February 22, 2006
Brent D. Yacobucci and Larry Parker
Resources, Science, and Industry Division
Congressional Research Service ˜ The Library of Congress

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Climate Change: Federal Laws and Policies
Related to Greenhouse Gas Reductions
Summary
Climate change is generally viewed as a global issue, but proposed responses
generally require action at the national level. In 1992, the United States ratified the
United Nations’ Framework Convention on Climate Change (UNFCCC), which
called on industrialized countries to take the lead in reducing greenhouse gases.
During the past decade, a variety of voluntary and regulatory actions have been
proposed or undertaken in the United States, including monitoring of electric utility
carbon dioxide emissions, improved appliance efficiency, and incentives for
developing renewable energy sources. This report provides background on the
evolution of U.S. climate change policy, from ratification of the UNFCCC to the
Bush Administration’s 2001 rejection of the Kyoto Protocol to the present. The
report focuses on major regulatory programs that monitor or reduce greenhouse gas
emissions, along with their estimated effect on emissions levels. In addition,
legislation in the 109th Congress calling for monitoring or reducing greenhouse gas
emissions is identified and examined.
The earlier Bush, Clinton, and current Bush Administrations have largely relied
on voluntary initiatives to reduce the growth of greenhouse gas emissions. This
focus is particularly evident in the current Administration’s 2002 Climate Action
Report (CAR), submitted under the provisions of the UNFCCC. Of the 50-plus
programs summarized in the 2002 CAR, 6 are described as “regulatory.” However,
this small subset of the total U.S. effort accounts for a large share of greenhouse gas
emission reductions achieved over the past decade. In general, these efforts were
established and implemented in response to concerns other than climate change, such
as energy efficiency and air quality.
Proposals to advance regulatory or market-oriented programs that reduce
greenhouse gases have been discussed in the 109th Congress. These efforts have
generally followed one of three tracks. The first would improve the monitoring of
greenhouse gas emissions as a basis for research and development and any future
reduction scheme. The second would enact a market-oriented greenhouse gas
reduction program along the lines of the current acid rain reduction program
established by the 1990 Clean Air Act Amendments. The third would enact energy
and related programs, such as appliance efficiency standards, that would also have
the effect of reducing greenhouse gases.
Omnibus energy legislation in the 109th and earlier Congresses has included
provisions indirectly related to greenhouse gas emissions, such as energy efficiency
and renewable energy. Other legislation has been introduced to establish mandatory
emissions reductions, create mandatory or voluntary emissions registries, tighten
efficiency standards for appliances and automobiles, and establish requirements for
the use of renewable energy. This report will be updated as events warrant.

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Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Background to Federal Climate Change Policy: From “No Regrets” Back
to “No Regrets” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
The International Framework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Developing Programs: EPACT and Climate Action Plans . . . . . . . . . . 3
Rejection of the Kyoto Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Regulatory Programs Affecting Emissions of Greenhouse Gases . . . . . . . . . . . . . 7
Monitoring Rules
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Carbon Dioxide Monitoring by Electric Generating Facilities . . . . . . . 7
Energy and Environmental Programs Related to Emissions Reductions . . . . 8
Emissions Reductions from Landfills . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Significant New Alternatives Policy (SNAP) Determinations . . . . . . . 9
Residential Appliance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Updating State Commercial Building Codes . . . . . . . . . . . . . . . . . . . . 10
Promoting Renewable Energy through PURPA . . . . . . . . . . . . . . . . . 11
Transportation-Related Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Corporate Average Fuel Economy (CAFE) . . . . . . . . . . . . . . . . . . . . . 11
Legislative Proposals in the 109th Congress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Market-Oriented Emissions Reduction Programs . . . . . . . . . . . . . . . . . . . . 12
Greenhouse Gas Emission Reduction Legislation . . . . . . . . . . . . . . . . 12
Multi-Pollutant Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Emissions Monitoring Proposals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Omnibus Energy Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Energy and Environmental Related Proposals . . . . . . . . . . . . . . . . . . . . . . . 16
Renewable Portfolio Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Appliance Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Transportation-Related Proposals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CAFE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
List of Tables
Table 1. Comparison of Administration’s Voluntary Program with
Proposed Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 2. 2000 Energy-Related Greenhouse Gas Emissions . . . . . . . . . . . . . . . . 17

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Climate Change: Federal Laws and Policies
Related to Greenhouse Gas Reductions
Introduction
Climate change is generally viewed as a global issue, but proposed responses
generally require action at the national level. In 1992, the United States ratified the
United Nations’ Framework Convention on Climate Change (UNFCCC) which
called on industrialized countries to take the lead in reducing greenhouse gases. Over
the past decade, a variety of voluntary and regulatory actions have been proposed or
undertaken in the United States, including monitoring of utility carbon dioxide
emissions, improved appliance efficiency, and incentives for developing renewable
energy sources.
In 2001, President George W. Bush rejected the Kyoto Protocol to the
UNFCCC, which called for legally binding commitments by developed countries to
reduce their greenhouse gas emissions.1 He also rejected the concept of mandatory
emissions reductions. Since then, the Administration has focused U.S. climate
change policy on voluntary initiatives to reduce the growth in greenhouse gas
emissions. This focus is particularly evident in the Administration’s 2002 Climate
Action Report (CAR) submitted under the provisions of the United Nations’
Framework Convention on Climate Change (UNFCCC). Of the over 50 programs
summarized in the 2002 CAR, only six are described as “regulatory.”2 These
regulatory programs were generally implemented to achieve energy or environmental
goals other than the reduction of greenhouse gas emissions, but produced a
concomitant emissions reduction. In this sense, they could be considered the results
of a “no regrets”3 policy where climate change effects resulting from related air
quality and energy policies are included in the decision-making process on new or
modified rules.
A number of congressional proposals to advance programs that reduce
greenhouse gases have been introduced in the 109th Congress. These efforts have
generally followed one of three tracks. The first would improve the monitoring of
1 For further information see CRS Report RL30692, Global Climate Change: The Kyoto
Protocol, by Susan R. Fletcher.
2 Most of the programs outlined in the report involve research, technical assistance,
information gathering, or technical assistance programs initiated by the federal government,
or voluntary emissions reduction programs coordinated by the government.
3 The “no regrets” policy was one of establishing programs for other purposes, that would
have concomitant greenhouse gas reductions. Therefore, only those policies that reduced
greenhouse gas emissions at no cost were considered.

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CRS-2
greenhouse gas emissions — as a basis for research and development and any future
reduction scheme. The second would enact a market-oriented greenhouse gas
reduction program along the lines of the trading provisions of the current acid rain
reduction program established by the 1990 Clean Air Act Amendments. The third
would enact energy and related programs that would also have the added effect of
reducing greenhouse gases. An example would be a requirement that electricity
producers generate a portion of their electricity from renewable resources (a
renewable portfolio standard).
This report provides background on the evolution of U.S. climate change policy
from ratification of the UNFCCC to the current Bush Administration’s rejection of
the Kyoto Protocol programs, to the present. Current major regulatory programs that
monitor or reduce greenhouse gas emissions are identified, along with their estimated
effect on greenhouse gas emissions. Finally, legislation in the 109th Congress to
monitor or reduce greenhouse gases (directly or indirectly) is identified and
discussed.
Background to Federal Climate Change Policy:
From “No Regrets” Back to “No Regrets”
The International Framework. U.S. policy toward global climate change
evolved from a “study only” to a “study and action” orientation in 1992 with
completion of the UNFCCC in Rio de Janeiro.4 Both nationally and internationally,
much of the debate over policies to address climate change has focused on energy
use, because fossil fuel consumption is the main source of greenhouse gas emissions
in most countries. During the deliberations on the UNFCCC, the National Academy
of Sciences (NAS) released a report on global warming. In this report, Policy
Implications of Greenhouse Warming, the NAS stated, “The United States could
reduce or offset its greenhouse gas emissions by between 10 and 40 percent of 1990
levels at low cost, or at some net savings, if proper policies are implemented.”5 The
NAS’s energy policy recommendations focused on increasing energy conservation
and efficiency, incorporating global warming as a factor in future energy planning,
and studying and eventually implementing “full social cost pricing” of energy.
Although
the
report was widely publicized, its recommendations were not
applied.6 Driven by concerns about scientific uncertainty and the potential costs to
4 For further information on global climate change, see the CRS Issue Brief IB89005, Global
Climate Change, by John R. Justus and Susan R. Fletcher.
5 National Academy of Sciences, Policy Implications of Greenhouse Warming (Washington,
D.C.: National Academy Press, 1991), p. 73.
6 For a review of the UNFCCC negotiations, see archived CRS Report 92-374, Earth Summit
Summary: United Nations Conference on Environment and Development (UNCED), Brazil,
1992, by and available from Brent Yacobucci and Larry Parker upon request. For previous
activities, see archived CRS Report 98-431, Global Climate Change: A Concise History of
Negotiations and Chronology of Major Activities Preceding The 1992 U.N. Framework
(continued...)

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CRS-3
the economy of measures to reduce greenhouse gas emissions, the previous Bush
Administration — contrary to the views of most environmentalists and some vocal
Members of Congress — refused to agree to the negotiation of a binding agreement
to reduce the nation’s CO emissions by a specific date. The UNFCCC reflects the
2
negotiating position of the United States and many other countries in that it called
only for voluntary control measures. Senate floor debate on ratification of the
UNFCCC brought out concerns by some Senators about the cost of compliance, its
impact on the country’s economic competitiveness, and the comprehensiveness with
respect to the omission of reduction commitments for developing countries —
concerns that were lessened because of the non-binding nature of the reduction
goals.7 Those arguing for emissions controls argued that controls could create jobs
and enhance economic health, and that high emissions indicated inefficiency.
Asserting that “the developed country Parties should take the lead” in reducing
emissions, the UNFCCC set the goal that developed countries aim to return their
greenhouse gas emissions to 1990 levels by the year 2000.8 In line with this goal,
developed countries agreed in principle to adopt national plans and policy options to
mitigate climate change by reducing anthropogenic emissions and enhancing sinks.
The United States submitted such plans in 1992, 1994, 1997, and 2002, as discussed
below.9
Developing Programs: EPACT and Climate Action Plans. The
Energy Policy Act of 1992 (EPACT)10 is the principal statutory basis for programs
that constitute the U.S. response to the UNFCCC.11 Programs developed pursuant
to EPACT, including appliance energy efficiency standards and updated building
codes, are discussed below. Primarily crafted as part of an energy policy response
to the Persian Gulf War of 1991, its energy conservation, renewable energy, and
other titles were also seen as having a beneficial effect on global climate change
concerns being debated at that time in international circles. In its 1992 submission
to the UNFCCC, the previous Bush Administration listed 11 different titles of
6 (...continued)
Convention, by and available from Brent Yacobucci and Larry Parker.
7 Congressional Record, vol. 138 (October 7, 1992), 33520-33527.
8 United Nations Framework Convention on Climate Change (UNFCCC), Article 3, Section
1.
9 For a more detailed discussion, see CRS Report RL30024, Global Climate Change Policy:
Cost, Competitiveness, and Comprehensiveness, by Larry B. Parker and John E. Blodgett.
10 A summary of provisions is contained in archived CRS Report 93-134, Energy Policy Act
of 1992: Summary and Implications, by and available from Brent Yacobucci and Larry
Parker upon request.
11 The other primary source of greenhouse-gas related regulations is the Clean Air Act,
particularly the 1990 Amendments. Clean Air Act regulations — concerning mandatory
carbon dioxide monitoring by electricity generators, landfill emissions reductions, and the
control of ozone depleting substances — are discussed below.

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EPACT as “extremely important” to its overall strategy of reducing greenhouse
gases.12
The previously referenced recommendations of the NAS were embodied in
several sections of EPACT. These sections included provisions to establish energy-
efficiency standards, promote dissemination of energy-saving information, establish
several national research and development programs related to deployment of energy-
efficiency technologies, and authorize the Department of Energy (DOE) to evaluate
cost-effective energy efficiency technologies. In addition to these activities to
improve energy efficiency, EPACT Title XVI aims to incorporate global warming
concerns in energy policy planning. It was designed to assist the government in
making informed decisions on global warming by authorizing DOE to collect,
analyze, and report information on climate change. DOE activities included
preparing a report on the various economic, energy, social, environmental, and
competitive implications of reducing greenhouse gas emissions; developing a least-
cost energy strategy designed to achieve “the stabilization and eventual reduction in
the generation of greenhouse gases”; creating a Director of Climate Change; and
developing an inventory of greenhouse gas emissions and early reductions in such
emissions.
Indeed, EPACT’s authors anticipated that it would help stabilize or even reduce
emissions of greenhouse gases at little cost, in line with the 1991 NAS report. As
stated by the House report:
The committee expects that, if fully implemented, H.R. 776 will result in a
substantial reduction in U.S. greenhouse gas emissions relative to forecasted
levels. The bulk of these reductions result from the programs that will
demonstrate and transfer advanced clean coal and renewable technologies
abroad, and from the domestic energy efficiency and renewable energy
initiatives. The provisions on electric utilities, alternative fuels and coalbed
methane are also significant.13
The notion that the United States could meet modest CO emission reduction
2
goals at little or no cost underlies many of the global climate change initiatives
during the previous Bush and Clinton Administrations, including the previous Bush
Administration’s “No Regrets” policy and 1992 Climate Action Plan, and the Clinton
Administration’s 1994 and 1997 Climate Action Plans.14 Using such an approach
to climate change policy, neither of these administrations requested regulatory
12 Department of State, National Action Plan for Global Climate Change (Washington,
D.C.: Department of State, 1992), p. 73.
13 Committee on Energy and Commerce, Comprehensive National Energy Policy Act,
H.Rept. 102-474, Part 1, March 30, 1992, p. 152.
14 On the “no regrets” policy of the George H. W. Bush Administration, see C. Boyden Gray
and David B. Rivkin, Jr., “A ‘No Regrets’ Environmental Policy,” Foreign Policy, summer
1991, pp. 47-65; for the various action plans, see U.S. Department of State, National Action
Plan for Global Climate Change, Department of State Publication 10026, December 1992;
U.S. Department of State, Climate Action Report, Department of State Publication, 1994;
and U.S. Department of State, Climate Action Report, Department of State Publication
10496, July 1997.

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authority from Congress to implement a climate change policy. Both advocated
strategies of undertaking governmental implementing actions that could be done
administratively, (unless Congress legislated otherwise) and of creating incentives
for private industry to voluntarily undertake emissions reduction initiatives.
The Clinton Action Plans were similar to the plan developed under the George
H. W. Bush Administration. Both were designed to foster market choices that would
conserve energy, increase energy efficiency, and encourage natural gas use. Both
were also designed to strengthen selected regulatory standards that concomitantly
also reduced greenhouse gas emissions — such as landfill regulations that curtail
methane releases. Several actions in the 1994 Clinton plan expanded programs listed
in the George H. W. Bush Administration’s plan by augmenting funding or technical
support to increase anticipated reductions. Other Clinton proposals were new:
Examples included a “Golden Carrot” program to induce efficiency improvements
of industrial equipment; a renewable energy consortium; a program to encourage
employers to replace parking subsidies with cash incentives to ride transit, car pool,
or find other ways to commute; and a program to promote more efficient nitrogen
fertilizer use.15
Rejection of the Kyoto Protocol. As it became clear that the voluntary
1992 greenhouse gas emission reduction goals would not be met, parties to the
UNFCCC began negotiations that culminated in the 1997 Kyoto Protocol to the
UNFCCC. This protocol outlined legally binding emissions reductions for developed
countries to specified amounts below 1990 levels, averaged over the years 2008 to
2012. The Clinton Administration committed to a 7% reduction below 1990 levels.
The Kyoto Protocol, if it had been submitted to the Senate and ratified, would have
changed the U.S. commitment from a voluntary one to a binding commitment.
Critics of the Kyoto Protocol raised concerns similar to those debated in connection
with the UNFCCC in 1992: concerns about cost, comprehensiveness, and
competitiveness. The possibility of failing to comply with a binding commitment
intensified the focus on potential costs of the U.S. global climate change policy. The
United States, along with most of the world, failed to meet the goal set at Rio of
returning 2000 emissions to the level that existed in 1990; a fact that raises questions
about the premise that significant greenhouse gas reductions can be achieved at little
or no costs.16 For those who believe substantial reductions in greenhouse gas
emissions would entail substantial costs, the Kyoto Protocol’s potential costs lead to
concerns about its effects on the country’s competitiveness and its exclusion of
developing countries from mandatory emission reductions (comprehensiveness).
That cost, competitiveness, and comprehensiveness remain pivotal factors in
climate change policy is illustrated by the current Bush Administration’s rejection of
the Kyoto Protocol early in 2001. In his June 11, 2001 speech on global climate
change, the President stated that the Kyoto Protocol was “fatally flawed in
15 President Clinton and Vice President Gore, The Climate Change Action Plan, White
House, October 1993.
16 Indeed, U.S. emissions of greenhouse gases were 14% above 1990 levels in 2000.
Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks,
Washington, D.C., April 2002, p. ES-3.

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fundamental ways.” A primary flaw outlined by the President is the exemption of
China and other large developing countries from its emissions reduction provisions.
This “comprehensiveness” concern was closely followed by “cost” and
“competitiveness” concerns. President Bush stated:
Kyoto is, in many ways, unrealistic. Many countries cannot meet their Kyoto
targets. The targets themselves are arbitrary and not based upon science. For
America, complying with those mandates would have a negative economic
impact with layoffs of workers and price increases for consumers. And when
you evaluate all these flaws, most reasonable people will understand that it’s not
sound public policy.17
To respond to global climate change, President Bush called for a new approach
focused on science and on flexible control mechanisms that employ market-based
incentives. Among the principles that the President argued should guide such a
program were the following:
We must always act to ensure continued economic growth in prosperity for our
citizens and for citizens throughout the world.... And finally, our approach must
be based on global participation, including that of developing countries whose
net greenhouse gas emissions now exceed those in the developed countries.18
The Administration’s 2001 proposal initiated a new voluntary greenhouse gas
reduction program, similar to ones introduced in previous administrations. The plan
focuses on improving the carbon intensity of the economy, reducing current
emissions of 183 metric tons of carbon equivalent per million dollars of GDP to 151
metric tons per million dollars of GDP by 2012. The plan proposed several voluntary
initiatives, along with increased spending and tax incentives, to achieve this goal.
However, the Administration stated that three-quarters of the projected reduction
would be achieved through current efforts underway, not by new initiatives. The
Administration projected that by 2010, the program could result in an emissions
reduction of approximately 4.5% relative to “business as usual.” However, this level
would still be approximately 28% higher than the 1990 level defined by the
UNFCCC. Further, without explicit requirements, it is unclear whether the targets
set by the Administration will be met.

A key piece of the Administration’s proposal was announced on February 12,
2003.19 Climate, Voluntary Innovative Sector Initiatives: Opportunities Now
(Climate VISION) was created in response to President Bush’s goal of reducing
greenhouse gas intensity of the U.S. economy.20 Climate VISION aims to assist
17 President George W. Bush, President Bush’s Speech on Global Climate Change, June 11,
2001.
18 Ibid.
19 Environmental Protection Agency, Bush Administration Launches “Climate VISION.”
February 12, 2003.
20 Greenhouse gas intensity is a measure of emissions per unit of economic activity (often
expressed as tons of emissions per thousand or million dollars of Gross Domestic Product).
(continued...)

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CRS-7
energy-intensive sectors in developing plans to reduce greenhouse gas intensity, and
to publicly recognize the efforts of those sectors.
Regulatory Programs Affecting
Emissions of Greenhouse Gases
As described above, current federal actions with respect to greenhouse gases
focus on research, information, and voluntary programs. Each of the Climate Action
Reports submitted by the United States to the UNFCCC has included a compilation
of the several dozen programs that various administrations have felt are relevant to
reducing U.S. greenhouse gas emissions.21 Regulatory measures that have reduced
greenhouse gas emissions are a small subset of the total U.S. effort numerically, but
are responsible for a proportionally larger share of greenhouse gas emission
reductions.22 In general, they were established and implemented primarily for
reasons other than climate change concerns. This is a “no regrets” policy in action.
The list of federal regulatory programs discussed here is primarily drawn from
activities listed by the George W. Bush Administration in its most recent (2002)
submission to UNFCCC.23 The submission to UNFCCC focuses on mandatory
programs, but numerous voluntary programs have also been implemented over the
past ten years. This section discusses the six regulatory programs listed in the
Climate Action Report, as well as one additional regulatory program (automotive fuel
economy standards) not included in the list.
Monitoring Rules
Carbon Dioxide Monitoring by Electric Generating Facilities.
Section 821 of the 1990 Clean Air Act Amendments requires electric generating
facilities affected by the acid rain provisions of Title IV to monitor carbon dioxide
in accordance with EPA regulations.24 This provision was enacted for the stated
purpose of establishing a national carbon dioxide monitoring system.25 As
promulgated by EPA, regulations permit owners and operators of affected facilities
20 (...continued)
For more on greenhouse gas intensity, see CRS Report 98-235, Global Climate Change:
U.S. Greenhouse Gas Emissions — Status, Trends, and Projections, by John Blodgett and
Larry Parker.
21 For the most recent compilation, see U.S. Department of State, U.S. Climate Action
Report, Washington, D.C., May 2002.
22 For example, EPA regulations on landfills and Significant New Alternatives Policy
Determinations (SNAP) account for 65 million metric tons of the 242 million metric tons
(carbon dioxide equivalent) in claimed reductions by the George W. Bush Administration
for the year 2000 (27% of total). U.S. Department of State, U.S. Climate Action Report,
Washington, D.C., May 2002. Both the landfill regulations and SNAP are discussed below.
23 Ibid.
24 Section 821, 1990 Clean Air Act Amendments (P.L. 101-549, 42 USC 7651k).
25 S.Rept. 101-952.

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to monitor their carbon dioxide emissions through either continuous emission
monitoring (CEM) or fuel analysis.26 The CEM regulations for carbon dioxide are
similar to those for the acid rain program’s sulfur dioxide CEM regulations. Those
choosing fuel analysis must calculate mass emissions on a daily, quarterly, and
annual basis, based on amounts and types of fuel used.
Although this regulation does not actually reduce carbon dioxide emissions, it
does expressly target the global climate change issue. Also, it represents a necessary
first step toward any future market-oriented greenhouse gas reduction program.
Whether a market-oriented control program were to be based on tradeable emissions
credits or a carbon tax, accurate emissions data would be the foundation for
developing the allocation systems, reduction targets, and enforcement provisions.
Energy and Environmental Programs Related to
Emissions Reductions
Emissions Reductions from Landfills. Section 305 of the 1990 Clean Air
Act Amendments requires EPA to control emissions of a variety of air pollutants
from new and existing large solid waste landfills.27 Specifically, the section requires
EPA to promulgate New Source Performance Standards (NSPS) for new municipal
solid waste landfills, and emissions guidelines for existing landfills to reduce
emissions of non-methane organic compounds (NMOC), including ozone-producing
volatile organic compounds (VOCs) and air toxics. Regulations promulgated in 1996
require large landfills that emit landfill gases in excess of 50 megagrams per year to
control emissions.28
The primary driver for the landfill regulations was reducing formation of
ground/surface level ozone (smog), and air toxics. However, in promulgating the
rule, the Clinton Administration noted that landfills were the largest U.S. source of
emissions of the greenhouse gas methane (40%), and that the rule would have the
indirect benefit of reducing methane emissions by 50%, equivalent to a 37.1 million
metric ton reduction in carbon by the year 2000.29 In its 2002 Climate Action Report,
the current Administration estimated that the year 2000 methane emissions
reductions achieved by the rule were 15 million metric tons of carbon dioxide
equivalent, predicted to increase to 33 million metric tons by 2010.30
26 See 40 CFR 75.13, along with appendix G (for CEMs specifications) and appendix F (for
fuel analysis specifications.
27 Landfill gas contains methane, carbon dioxide, and numerous Non-methane Organic
Compounds (NMOC), including vinyl chloride, toluene, and benzene.
28 61 Federal Register 9905-9944 (March 12, 1996)
29 EPA, Fact Sheet: Final Air Regulations for Municipal Solid Waste Landfills, March 1,
1996. This is due to the fact that techniques to reduce methane and non-methane organic
compounds are basically the same.
30 U.S. Department of State, U.S. Climate Action Report 2002, Washington D.C., May 2002,
p. 60.

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Significant New Alternatives Policy (SNAP) Determinations. Because
many ozone-depleting substances are also greenhouse gases (such as
perfluorocarbons), efforts to protect the ozone layer also tend to reduce greenhouse
gas emissions. Title VI of the 1990 Clean Air Act Amendments represents the
United States’ primary response on the domestic front to the ozone depletion issue.31
It also implements this country’s international responsibilities under the Montreal
Protocol to Reduce Ozone-Depleting Substances.32 Section 612 requires EPA to
develop a program to identify alternatives to ozone depleting substances banned
under the Montreal Protocol. In determining the acceptability of an alternative, EPA
is to assess the overall risk to human health or the environment that the alternative
poses, compared with other alternatives. In promulgating the implementing
regulation for the program in 1994, EPA identified increased global warming as one
of the risk criteria that it would use in determining the acceptability of an
alternative.33
Under the regulation, EPA has restricted or narrowed the use of
hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs) where alternatives with
lower global warming potentials exist. EPA estimates that the restrictions reduced
greenhouse gas emissions by 50 million metric tons of carbon dioxide equivalent in
2000, and projects a further reduction of 156 million tons (for a total of 206 million
tons) by 2010.34
Residential Appliance Standards. The 1987 National Appliance Energy
Conservation Act (NAECA)35 set minimum efficiency standards for many major
appliances.36 The Energy Policy Act of 1992 (EPACT) expanded the list of covered
appliances and allowed for future standards development for other products.37 Under
NAECA and EPACT, the Department of Energy must develop mandatory energy
efficiency standards for these appliances, and review them in accordance with a
31 There is a complex scientific relationship between ozone depletion, ozone-depleting
chemicals and climate change. This section focuses on the global warming potential of
various substitutes being used in place of the ozone-depleting chemicals banned under the
Montreal Protocol, not on the global warming potential of the banned ozone-depleting
chemicals themselves.
32 It should be noted that emissions controlled under the Montreal Protocol are separate from
those controlled by the Kyoto Protocol, and any reductions in ozone-depleting compounds
would not count toward Kyoto Protocol targets.
33 59 Federal Register 13049 (March 18, 1994).
34 U.S. Department of State, U.S. Climate Action Report 2002, Washington D.C., May 2002,
p. 209.
35 P.L. 100-12.
36 As amended in 1988, appliances included refrigerators, refrigerator-freezers, freezers,
room air conditioners, fluorescent lamp ballasts, incandescent reflector lamps, clothes
dryers, clothes washers, dishwashers, kitchen ranges and ovens, pool heaters, television sets
(withdrawn in 1995), and water heaters.
37 Additional appliances included commercial building heating and air conditioning
equipment, water heaters, certain incandescent and fluorescent lamps, distribution
transformers, and electric motors.

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statutorily set schedule to determine whether they are sufficiently stringent. DOE is
required to set standards designed to achieve the maximum improvement in energy
efficiency it believes is “technically feasible and economically justifiable.”38
The primary driver for residential appliance standards has been energy
conservation. In 1997, the Clinton Administration estimated that the appliance
standards would save almost a quad (1 quadrillion Btu) of energy, resulting in a 21.6
million metric ton reduction in carbon emissions by the year 2010.39 The current
Bush Administration has provided no specific estimate for carbon emission
reductions from residential appliance standards. However, for the entire category of
commercial and residential energy, the Bush Administration in the 2002 Climate
Action Report estimates reductions of 56.8 million tons of carbon dioxide in 2002.40
Updating State Commercial Building Codes. Section 101 of EPACT
requires DOE to review and update provisions of the commercial building code with
respect to energy efficiency.41 Specifically, DOE is directed to determine whether
revisions to the ASHRAE42 Standard 90.1 — 1989 (and any future revisions) would
improve energy efficiency in commercial buildings. If DOE determines that
revisions would improve energy efficiency, states are required to review and update
their commercial building codes accordingly, with respect to improving energy
efficiency. In July 2002, DOE determined that ASHRAE/IESNA Standard 90.1 —
1999 would save energy in commercial buildings.43 Thus, states were required to
review and update their commercial building codes by July 15, 2004.44
In announcing its July 2002 determination, the DOE focused on the energy
savings that state adoption of the standard would entail, estimated at 130 million
barrels of oil equivalent over 10 years.45 The DOE announcement does not mention
any carbon dioxide reduction that could result from the improved energy efficiency.
In its Climate Action Plan, the current Bush Administration provides no specific
38 10 CFR Chapter II, Part 430. For a summary of resulting standards, see [http://www.
eere.energy.gov/buildings/appliance_standards/residential_products.html].
39 U.S. Department of State, U.S. Climate Action Report 1997, Washington D.C., July 1997,
p. A-7.
40 U.S. Department of State, U.S. Climate Action Report 2002, Washington D.C., May 2002,
p. 64.
41 Section 101, 1992 Energy Policy Act, P.L. 102-486. The section contains provisions for
updating residential building codes; however, those provisions only require states to review
any DOE determination with respect to updating codes. Adoption of the revisions is not
mandatory.
42 American Society of Heating, Refrigeration, and Air Conditioning Engineers.
43 67 Federal Register 46464 (July 15, 2002).
44 As of March 2005, 10 states had not updated their commercial building energy codes,
according to the Building Codes Assistance Project. See [http://www.bcap-energy.org].
45 DOE, Energy Department Determines that Model Commercial Building Code Will Save
Energy & Benefit Consumer, July 15, 2002. Available at [http://www.energycodes.gov/
implement/determinations_com_news.stm].

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CRS-11
estimate concerning carbon dioxide emissions reductions from updating commercial
building codes.46 However, any real reduction in fossil fuel use would have
concomitant greenhouse gas emissions reductions.
Promoting Renewable Energy through PURPA. The 1978 Public Utility
Regulatory Policies Act (PURPA) is designed to encourage the development of
cogeneration and small power production (called “qualifying facilities” or QFs).47
In particular, Section 210 contained a mandatory purchase clause requiring utilities
to buy power from QFs at the utilities’ avoided cost. PURPA exempted from the full
breadth of federal and state regulation certain small power producers, including those
using geothermal, solar, wind, and waste energy.48 This regulatory exemption, along
with the mandatory purchase requirement contained in Section 210, has proven to be
a strong incentive for development of renewable energy, particularly biomass. QF
renewable capacity represents a substantial majority of U.S. non-hydroelectric
renewable energy capacity.49 These provisions were repealed by the Energy Policy
Act of 2005 (see the section below on “Omnibus Energy Legislation”).
PURPA was enacted to promote energy security through energy conservation
and the development of alternative energy sources in the aftermath of the 1974 oil
crisis. As events have unfolded, the effort to reduce dependence on fossil fuels has
had the additional perceived benefit of reducing carbon dioxide emissions. In 1997,
the Clinton Administration estimated that its renewable energy commercialization
efforts with respect to biomass, geothermal, and wind would reduce greenhouse gas
emissions by 17.6 million metric tons of carbon equivalent by the year 2010.50 The
current Bush Administration provides no specific estimate of reductions from the use
of renewable energy in its Climate Action Report. However, for the general category
of energy supply, the Administration estimated the year 2000 effect to have been a
saving of 14.7 million metric tons of carbon dioxide equivalent.51
Transportation-Related Programs
Corporate Average Fuel Economy (CAFE). Although not listed as a
regulatory program in the Administration’s Climate Action Report, federal fuel
economy standards directly affect greenhouse gas emissions from the transportation
46 U.S. Department of State, U.S. Climate Action Report 2002, Washington D.C., May 2002,
p. 64.
47 P.L. 95-617 (1978)
48 As originally enacted, the law limited most small power producers to 30 Mw, with
geothermal energy limited to 80 MW. The Solar, Wind, Waste, and Geothermal Production
Incentives Act of 1990 (P.L. 101-575) removed the size limitations.
49 Energy Information Administration, Renewable Energy 2000: Issues and Trends,
Washington, D.C., February 2001, p. 10.
50 U.S. Department of State, U.S. Climate Action Report 1997, Washington D.C., July 1997,
pp. A-23, A-24, and A-27.
51 U.S. Department of State, U.S. Climate Action Report 2002, Washington D.C., May 2002,
p. 65.

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CRS-12
sector. The Energy Policy and Conservation Act of 1975 (EPCA) established
corporate average fuel economy (CAFE) standards for new passenger cars, and gave
the Department of Transportation (DOT) the authority to set standards for other
vehicles, including “light trucks,” which consist of pickups, vans, and sport utility
vehicles.52 The goal of EPCA was to reduce the dependence on foreign oil after the
Arab oil embargo of the 1970s. The model year 2006 standards are 27.5 miles per
gallon for passenger cars and 21.6 miles per gallon for light trucks.
Increasing CAFE standards would lead to reductions in fuel consumption and
greenhouse gas emissions as older, less efficient vehicles were replaced with more
efficient models. However, concerns associated with increased CAFE standards
include questions of occupant safety and vehicle choice. In 1994, the Clinton
Administration considered raising the CAFE standard for light trucks. However,
Congress included language in the annual FY1996-FY2001 DOT Appropriations
Acts53 prohibiting the use of appropriated funds for any rulemaking on CAFE,
effectively freezing the standards. However, the Senate conferees on the FY2001
appropriations insisted upon a study of CAFE by the National Academy of Sciences
(NAS). That study, released on July 30, 2001, concluded that it would be possible to
achieve a more than 40% improvement in light truck fuel economy over a 10- to15-
year period at costs that would be recoverable over the lifetime of vehicle ownership,
without compromising safety.
On April 1, 2003, the Department of Transportation announced a final rule to
increase light truck CAFE standards to 22.2 miles per gallon by model year 2007.54
DOT estimates that this measure will save approximately 3.6 billion gallons of
gasoline over the life of the vehicles. This translates to an emission reduction of
roughly 8 to 10 million metric tons of carbon equivalent.
Legislative Proposals in the 109th Congress
As evidenced in recent legislative proposals, some Members of Congress
believe that additional emissions reduction efforts are needed. Therefore, several
proposals have been discussed in the 109th Congress. These include bills on
comprehensive energy legislation, greenhouse gas emissions monitoring and
reduction programs, and programs to increase energy efficiency in various sectors.
Market-Oriented Emissions Reduction Programs
Greenhouse Gas Emission Reduction Legislation. Two companion
bills introduced in the 109th Congress focus directly on reducing greenhouse gases
emissions. S. 342, introduced by Senators McCain and Lieberman (expanded in May
2005 and reintroduced as S. 1151), and H.R. 759, introduced by Representatives
52 P.L. 94-163.
53 P.L. 104-50 (FY1996), P.L. 104-205 (FY1997), P.L. 105-66 (FY1998), P.L. 105-277
(FY1999), P.L. 106-69 (FY2000), and P.L. 106-346 (FY2001).
54 68 Federal Register 16867-16900. April 7, 2003.

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CRS-13
Gilchrest and Olver, would cap emissions of carbon dioxide at reduced levels from
electricity generation and from the industrial and commercial sectors. The bills
would reduce emissions of the six greenhouse gases covered under the Kyoto
Protocol from anticipated levels with an emissions cap in the year 2010 based on
affected facilities’ 2000 emissions (for any entity that emits from a single facility
more than 10,000 metric tons of greenhouse gases (carbon dioxide equivalent)). The
program would be implemented through an expansive allowance trading program
that would allow cross-sector trading, increases in carbon sequestration, and limited
acquisition of allowances from foreign sources.55 In June 2005, S. 1151 was debated
on the Senate floor as S.Amdt. 826 and defeated by a 38-60 vote. H.R. 2828,
introduced by Representative Inslee, is an omnibus energy bill addressing various
topics, including a reduction program similar to the program in the above bills.
Multi-Pollutant Legislation. Interest has been expressed in finding
mechanisms to achieve public health and environmental goals in simpler, more cost-
effective ways. One proposed approach is a “multi-pollutant” strategy — a
framework based on a consistent set of emissions caps, implemented through
emissions trading. During the 109th Congress, six bills have been introduced to
reduce emissions from electric utility facilities.56 Four of those bills include carbon
dioxide among the emissions to be reduced.
S. 150, introduced by Senator Jeffords, is a modified version of the multi-
pollutant bill (S. 556) reported out by the Senate Environment and Public Works
Committee during the 107th Congress. Placing emission caps on nitrogen oxides,
sulfur dioxide, and carbon dioxide, S. 150 would require electric generating facilities
producing 15 MW or greater to meet an aggregate carbon dioxide emissions cap in
the year 2010. The national emissions cap would be set at 1990 emissions levels for
electric generating facilities, would be implemented through a tradeable allowance
program, and would include significant penalties for non-compliance. In addition to
these emission caps, S. 150 would place facility-specific emission limitations on
mercury. S. 730, introduced by Senator Leahy, would likewise impose emission caps
on these four pollutants at the same level and on the same schedule as S. 150.
However, S. 730 would restrict trading to within a single facility, not across different
sites. No trading of mercury emissions would be permitted.

H.R. 1451, introduced by Representative Waxman, is similar to H.R. 2042 in
the 108th Congress. Placing emission caps on nitrogen oxides, sulfur dioxide, and
carbon dioxide, H.R. 1451 would require electric generating facilities producing 15
MW or greater to meet an aggregate carbon dioxide emissions cap in the year 2010.
The national emissions cap would be set at 1990 emissions levels for electric
generating facilities, and would be implemented through a tradeable allowance
program. In addition to these emission caps, H.R. 1451 would place facility-specific
emission limitations on mercury.
55 For a further discussion, see CRS Report RS22076, Climate Change: Summary and
Analysis of the Climate Stewardship Act (S. 342 and H.R. 759), by Larry Parker.
56 For a side-by-side comparison of these bills, see CRS Report RL32755, Air Quality:
Multi-Pollutant Legislation in the 109th Congress, by Larry Parker.

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CRS-14
H.R. 1873, introduced by Representative Bass, places emissions caps on all four
pollutants for electric generating facilities over 25 Mw in two phases: 2010 and 2015.
For carbon dioxide, the cap in 2010 would be set at projected 2006 levels, declining
to actual 2001 levels in 2015.
Based on the estimate provided by the Administration’s climate change
proposal, and using the 2002 Climate Action Report57 (CAR) for projections to 2010,
Table 1 presents estimates of U.S. greenhouse gas emissions in 2010, assuming the
Administration’s voluntary program reaches its goals.58 This should not be taken as
a given, as neither the George H. W. Bush Administration’s program nor the Clinton
Administration’s program achieved their stated goals. Thus, in one sense, comparing
a mandatory reduction program such as that proposed by S. 342/H.R. 759/H.R.
2828/S. 1151, S. 150, S. 730, H.R. 1451, or H.R. 1873 with the Administration’s
voluntary program is comparing apples to oranges. The first is legally binding, the
second is the expression of a planning goal.
Table 1. Comparison of Administration’s Voluntary Program
with Proposed Legislation
Percentage Change vs.
Percentage Change vs.
Business as Usual (2010)
1990 levels per UNFCCC
S. 150, S. 730
-7.5%
+24.2%
S. 342/H.R. 759/H.R.
2828/S. 1151a
-5.0%
+27.7%
H.R. 1451
-9.5%
+21.7%
H.R. 1873
-0.8%
+33.2%
Administration’s
Voluntary Programb
-4.4 to -4.5%
+28.3%
Business as Usual
0
+34.4%
Source: CRS calculations based on projections contained in 2002 CAR.
a. Depending on actual coverage and the implementation strategies employed by affected sources,
reductions achieved by S. 342/H.R. 759/S. 1151 could be above the 5% estimate presented here.
CRS estimates that reductions based on 85% coverage and U.S.-only implementation would be
about 8.8% below anticipated 2010 levels, 22.6% above 1990 levels.
b. Assumes goal of the Administration’s voluntary program is achieved in 2010, rather than 2012.
57 Climate Action Report — 2002, at [http://yosemite.epa.gov/oar/globalwarming.nsf/content/
ResourceCenterPublicationsUSClimateActionReport.html]. This is the U.S. report to the
UNFCCC Secretariat on U.S. emissions and measures taken to reduce them.
58 For a discussion of emission projections and trends, see CRS Report 98-235, Global
Climate Change: U.S. Greenhouse Gas Emissions — Status, Trends, and Projections, by
John Blodgett and Larry Parker.

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CRS-15
Although S. 150, S. 730, and H.R. 1451 focus on electric utility emissions, the
mandated reductions would result in lower total greenhouse gas emissions in 2010
than those projected to occur under the Administration’s initiative that includes all
sources of all greenhouse gases.59 Only H.R. 1873 could result in higher emissions.
However, neither the Congressional proposals nor the Administration’s initiative
would be sufficient to bring U.S. emissions near the level committed to in the 1992
UNFCCC.
Emissions Monitoring Proposals
H.R. 955 (Olver) would require entities with yearly emissions of 10,000 metric
tons or more of greenhouse gases (carbon dioxide equivalent) to monitor and report
their greenhouse gas emissions. This bill would not require emissions reductions.60
Omnibus Energy Legislation
In 2005, the 109th Congress completed omnibus energy legislation with
provisions directly and indirectly related to greenhouse gas emissions. On August
8, 2005, President Bush signed the Energy Policy Act of 2005 (P.L. 109-58). Title
XVI establishes a voluntary national program designed to encourage voluntary
reductions in greenhouse gases. The effort is led by an Interagency Committee, with
DOE playing a key supporting role. Title XVI attempts to support actions focused
on reducing U.S. carbon intensity, but it would not establish a requirement to reduce
emissions. The title also establishes a program to encourage exports of carbon
intensity-reducing technologies to developing countries. This program is led by the
Secretary of State.
In addition to Title XVI, Section 1253 repeals the mandatory purchase
requirement under Section 210 of PURPA for new contracts if FERC finds that a
competitive electricity market exists and if other conditions are met.61 The debate
over the bill included proposals to increase CAFE standards and to establish a
renewable portfolio standard, although these changes were not included in the final
law.
Not included in P.L. 109-58 was Section 1612 of the Senate bill (H.R. 6), which
expressed the Sense of the Senate that human activities are a substantial cause of
greenhouse gas accumulation in the atmosphere, causing average temperatures to
59 The assessment assumes that the Administration’s proposal actually achieves its goal in
2010, rather than 2012. Depending on S. 342/H.R. 759/S. 1151’s actual coverage and
implementation strategies employed by affected sources, achieved reductions could be
greater than the 5% estimate presented in Table 1. CRS estimates reductions based on 85%
coverage and U.S.-only implementation plans would be about 8.8% below anticipated 2010
levels, 22.6% above 1990 levels.
60 H.R. 759, H.R. 28228, and S. 1151, discussed above, would require reductions.
61 Proponents of renewable energy argued that repeal would reduce the role of renewables,
while advocates of repeal argued that renewables no longer need economic intervention.
For a more detailed discussion of PURPA, see CRS Report RL32728, Electric Utility
Regulatory Reform: Issues for the 109th Congress, by Amy Abel.

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CRS-16
rise. Further, the resolution called for a mandatory, market-based program to limit
greenhouse gas emissions. Also, S. 1151 was debated on the Senate floor as S.Amdt.
826 and defeated by a 38-60 vote.
Energy and Environmental Related Proposals
Renewable Portfolio Standard. One approach to reducing greenhouse gas
emissions is to require the use of renewable energy resources in power generation.
H.R. 983 (Udall) would require retail electric suppliers to produce 20% of their
power from renewable resources by 2027. Renewable resources include solar, wind,
geothermal, biomass, and incremental hydroelectric power. S. 427 (Jeffords) would
require a standard of 20% by 2020.
Appliance Efficiency. Increasing appliance efficiency is seen as another way
to reduce energy consumption and therefore reduce greenhouse gas emissions. P.L.
109-58 established establish tax credits for the purchase of certain energy-efficient
appliances. H.R. 142 (Nussle) would establish similar credits.
Transportation-Related Proposals
CAFE. Because transportation plays such a large role in U.S. dependence on
oil as well as in greenhouse gas emissions, there has been continuing congressional
interest in Corporate Average Fuel Economy (CAFE) standards. H.R. 705
(Gilchrest) would require an increase in light truck standards to 26.1 miles per gallon
by 2011. H.R. 1103 (Nancy Johnson) would require the Environmental Protection
Agency to update its CAFE test procedures to better reflect real-world conditions.62
Conclusion
Energy policy continues to be a key issue in the 109th Congress, as it was in
107th and 108th Congresses. High energy prices and international instability
motivated passage of the 2005 Energy Policy Act. In addition to comprehensive
energy legislation, stand-alone bills have been introduced to directly address energy
supply and demand issues.
With respect to proposed legislation to reduce greenhouse gas emissions, a
common thread is their focus on energy supply and demand. This linkage is reflected
in the current debate on these proposals. The CAFE standard, appliance efficiency,
renewable portfolio standard, and other proposals would have a direct effect on fuel
demand and choice, if enacted. Likewise, proposals directly focused on CO2
emissions, including multi-pollutant bills, are being debated with respect to their
impact on energy policy (particularly with respect to effects on natural gas and coal
demand).
62 Currently, CAFE test procedures over-estimate actual in-use fuel economy. If in-use fuel
economy were equal to CAFE ratings, fuel consumption would be significantly lower.
Section 774 of P.L. 109-58 requires EPA to update testing procedures for vehicle window
stickers; however, this change does not affect the procedures for CAFE compliance.

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CRS-17
Given that energy consumption is the dominant source of carbon dioxide
emissions in this country, and a substantial source of overall greenhouse gas
emissions, any reduction in energy consumption will likely lead to lower emissions.
As indicated below, energy-related activities are responsible for about 85% of the
country’s greenhouse gas emissions, and 96% of its carbon dioxide emissions. Any
effective climate change policy directed at reducing greenhouse gas emissions has to
deal directly with energy consumption and, thus, be integrated with energy policy.
However, because at the present time energy supply and demand issues are seen as
more pressing than climate change, the political climate has favored action on general
energy legislation, as opposed to legislation specifically targeting climate change, as
indicated by passage of the 2005 Energy Policy Act.
Table 2. 2000 Energy-Related Greenhouse Gas Emissions
(million metric tons of CO equivalent)
2
Energy-related
Total U.S. 2000
Energy as percent
Greenhouse gas
2000 emissions
emissions
of total
Carbon Dioxidea
5,629
5,840
96%
Methane
211
615
34%
Nitrous Oxide
73
425
17%
HFC, PFC, SF6
14
121
12%
Totals
5,927
7,001
85%
Source: Environmental Protection Agency, Inventory of U.S. Greenhouse Gas Emissions and Sinks:
1990-2000, April 2002.
Note: Because carbon dioxide is by far the largest volume greenhouse gas, energy-related emissions
are responsible for the majority of total greenhouse gas emissions.
a. Biomass not included.
As noted in this report, climate change was an integral part of the debate on
1992 Energy Policy Act (EPACT), occurring as it did during the signing and ratifying
of the UNFCCC.63 Indeed, EPACT became the implementing legislation for the
UNFCCC, and, as discussed in this report, those programs are responsible for much
of the reduced growth in greenhouse gases achieved since 1992. Most federal
policies and regulations that have resulted in greenhouse gas reductions were, in fact,
promulgated as energy policy initiatives.
Climate change — as a specific issue needing a regulatory response — was
debated during deliberations on the 2005 Energy Policy Act and recognized in
passage of Senate Amendment 866 expressing the Sense of the Senate that Congress
should enact a comprehensive and effective national program of mandatory, market-
63 For more on the relationship between UNFCCC and EPACT, see CRS Report RL30024,
Global Climate Change Policy: Cost, Competitiveness, and Comprehensiveness, by Larry
Parker and John Blodgett.

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CRS-18
based limits and incentives on greenhouse gases that slow, stop, and reverse the
growth of such emissions. However, the effect of the 2005 Energy Policy Act on
future greenhouse gas emissions is unclear, and specific action on the issue will
depend on efforts to enact the national program called for in Senate Amendment 866.
If perceptions of the urgency of the climate change problem increase, either due to
further research and understanding of the issue and its risks, or from an empirical
event such as an abrupt change in climate, the need to reintegrate the energy-climate
change policy debate might have to be considered.

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