U.S. States & Regions
States and regions across the country are adopting climate policies, including the development of regional greenhouse gas reduction markets, the creation of state and local climate action and adaptation plans, and increasing renewable energy generation. Read More
Climate change is happening and it is caused largely by human activity. Its impacts are beginning to be felt and will worsen in the decades ahead unless we take action. The solution to climate change will involve a broad array of technologies and policies—many tried and true, and many new and innovative.
This overview summarizes the eight-part series Climate Change 101: Understanding and Responding to Global Climate Change.
Science and Impacts discusses the scientific evidence for climate change and explains its causes and current and projected impacts.
Adaptation discusses these impacts in greater depth, explaining how planning can limit (though not eliminate) the damage caused by unavoidable climate change, as well as the long-term costs of responding to climate-related impacts.
As explored in greater depth in Technological Solutions, a number of technological options exist to avert dangerous climatic change by dramatically reducing greenhouse gas emissions both now and into the future.
Business Solutions, International Action, Federal Action, State Action, and Local Action describe how business and government leaders at all levels have recognized both the challenge and the vast opportunity dealing with climate change presents. These leaders are responding with a broad spectrum of innovative solutions. To address the enormous challenge of climate change successfully, new approaches are needed at the federal and international levels, and the United States must stay engaged in the global effort while adopting strong and effective national policies.
For more information, be sure to listen to our Climate Change 101 podcast series
For years, U.S. states and regions have been taking action to address climate change in the absence of federal legislation. A wide range of policies have been adopted at the state and regional levels to reduce greenhouse gas emissions, develop clean energy resources, and promote more energy-efficient vehicles, buildings, and appliances, among other things. Although climate change will ultimately require a national and international response, the actions taken by states and regions will continue to play an important role by developing and testing innovative solutions, demonstrating successful programs, and laying the groundwork for broader action.
Across the United States, cities, towns, and counties are enacting policies and programs to reduce greenhouse gas emissions. Many local governments are motivated by concerns about the impacts of climate change in their communities as well as an understanding that energy and climate solutions can benefit local economies and residents. Their actions reflect a strong history of local leadership in climate protection in the United States. While local governments face a number of limitations in addressing climate change, they can be a key part of the solution. Like states and regions, local governments can demonstrate leadership by implementing strategies to confront climate change and laying the groundwork for broader action at the national and international levels.
By: David L. Greene and Steven E. Plotkin
Download this paper (pdf)
Project Director: Judi Greenwald
Project Manager: Nick Nigro
This report examines the prospects for substantially reducing the greenhouse gas (GHG) emissions from the U.S. transportation sector, which accounts for 27 percent of the GHG emissions of the entire U.S. economy and 30 percent of the world’s transportation GHG emissions. Without shifts in existing policies, the U.S. transportation sector’s GHG emissions are expected to grow by about 10 percent by 2035, and will still account for a quarter of global transportation emissions at that time. If there is to be any hope that damages from climate change can be held to moderate levels, these trends must change.
This report shows that through a combination of policies and improved technologies, these trends can be changed. It is possible to cut GHG emissions from the transportation sector cost-effectively by up to 65 percent below 2010 levels by 2050 by improving vehicle efficiency, shifting to less carbon intensive fuels, changing travel behavior, and operating more efficiently. A major co-benefit of reducing transportation’s GHG emissions is the resulting reductions in oil use and improvements in energy security.
It develops three scenarios that diverge from “business as usual,” based on the assumption that the United States is willing to change the incentives and regulations that affect the design of vehicles, the types of fuels that are used, the choices made by individuals and businesses in purchasing and using vehicles, and how communities and their transportation infrastructure are built and used.
This report is an update of the Center's 2003 report on Reducing Greenhouse Gas Emissions From U.S. Transportation
Related white papers on Transportation Reauthorization:
About the Authors:
David L. Greene is a Corporate Fellow of Oak Ridge National Laboratory, Senior Fellow of the Howard H. Baker, Jr. Center for Public Policy and a Research Professor of Economics at the University of Tennessee. He is an author of more than 200 publications on transportation and energy issues. Mr. Greene is an emeritus member of both the Energy and Alternative Fuels Committees of the Transportation Research Board and a lifetime National Associate of the National Academies. He received the Society of Automotive Engineers’ Barry D. McNutt Award for Excellence in Automotive Policy Analysis, the Department of Energy’s 2007 Hydrogen R&D Award, and was recognized by the Intergovernmental Panel on Climate Change for contributions to the IPCC’s receipt of the 2007 Nobel Peace Prize. He holds a B.A. from Columbia University, an M.A. from the University of Oregon, and a Ph.D. in Geography and Environmental Engineering from The Johns Hopkins University.
Steven Plotkin is a staff scientist with Argonne National Laboratory’s Center for Transportation Research, specializing in analysis of transportation energy efficiency. He has worked extensively on automobile fuel economy technology and policy as a consultant to the Department of Energy, and was a co-principal investigator on ANL’s Multi-Path Transportation Futures Study. Mr. Plotkin was a lead author on the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report Climate Change 2007: Mitigation of Climate Change and has been selected to participate on the Fifth Assessment Report. He was for 17 years a Senior Analyst and Senior Associate with the Energy Program of the Congressional Office of Technology Assessment (OTA) and prior to that he was an environmental engineer with the U.S. Environmental Protection Agency. Mr. Plotkin has a B.S. degree in Civil Engineering from Columbia University and a Master of Engineering (Aerospace) degree from Cornell University. He is the 2005 recipient of the Society of Automotive Engineers’ Barry D. McNutt Award for Excellence in Automotive Policy Analysis.
With EPA’s recent announcement of timelines for additional regulation of greenhouse gases (utility and refinery sectors) and the arrival in town this week of the new Congress, the shouting about EPA’s regulatory actions has already begun. Many of these claims are clearly political posturing – the facts are that schools, churches, and libraries will NOT be subject to regulations, there will NOT be a moratorium on all new industrial facilities for at least 18 months, and new coal plants will NOT be banned. But it is also true that regulating greenhouse gases (GHGs) has the potential to substantially impact our economy and is critical to reducing the risks and costs associated with climate change. The critical challenge facing EPA is how to properly balance the costs of reducing GHG emissions against the benefits of limiting climate change. How EPA balances these interests demands a serious discussion. In an effort to lower the volume and better inform future discussions about EPA’s use of its regulatory authority, the following are key factors that should be considered.
1. EPA is not overreaching by regulating greenhouse gases (GHGs) under the Clean Air Act but is doing so in direct response to the Supreme Court’s 2007 ruling in Mass. v. EPA.
Some have incorrectly claimed that EPA has overstepped its authority in regulating greenhouse gases and is attempting to regulate GHGs even though Congress failed to pass climate legislation last year. In fact, it is the Supreme Court in 2007 that clarified that EPA had the authority to regulate GHGs under the existing Clean Air Act. EPA had denied a petition by some states and environmental groups calling on it to begin regulating GHGs under the existing Clean Air Act. The Supreme Court rejected EPA’s claim that the Clean Air Act does not apply to GHGs and held that these emissions meet the definition of an “air pollutant” under the Act. The court held that “under the Act’s clear terms, EPA can avoid promulgating regulations only if it determines that greenhouse gases do not contribute to climate change or if it provides some reasonable explanation as to why it cannot or will not exercise its discretion to determine whether they do.” Based on its extensive review of the scientific evidence in its endangerment finding, EPA reached the only conclusion that the evidence supported – that GHG emissions cause or contribute to air pollution, which may reasonably be anticipated to endanger public health or welfare and, therefore, are subject to regulation under the Clean Air Act.
2. EPA’s regulations will not require unproven technologies, impose excessive costs at a time when our economy is hurting, or harm small and previously unregulated sources.
There are legitimate concerns that the Clean Air Act was not developed specifically with GHGs in mind and these emissions are different in fundamental ways from traditional hazardous and criteria pollutants covered by the Act. As a result, EPA has gone to great lengths to “tailor” its regulations -- for example, with respect to new source permitting -- in such a way that only the largest sources of GHGs are covered. This tailoring rule has been challenged in courts (along with all other GHG regulations). If it is overturned, Congressional intervention would likely be necessary. But the Clean Air Act includes many provisions that minimize compliance costs, and many of its fundamental requirements apply equally well to regulating GHGs. For example, the Act requires that technological feasibility and costs be considered in setting emission performance standards and allows for different requirements for new and existing sources. In its guidance to states on what constitutes “best available control technology,” EPA has focused on energy efficiency technologies as a means to achieve both reductions in GHG emissions and cost savings to firms. The agency has also made it clear that the use of coal as a fuel can be continued under its guidelines. While EPA regulations will impose some costs on firms, based on guidance to date, those costs are likely to be modest and will result in far greater benefits than costs to society.
3. Delaying any EPA regulatory actions would be bad for business and bad for the climate.
Delaying regulations by EPA will allow some firms to avoid compliance costs in the near term but will increase overall costs over the longer term. For firms in states already facing GHG requirements (e.g., utilities in 10 northeast and mid-Atlantic states, large emitters in California), any delay in EPA regulations are not likely to alter the requirements they face. For firms in other locations that are planning facilities with long lifetimes, some are likely to install the same technology that would be required by EPA in an effort to avoid more expensive retrofits in the near future. These firms would prefer the certainty of knowing what regulatory requirements they must meet prior to making large capital investments. Finally, delay in reducing GHG emissions will result in greater economic harm throughout our society as families and communities face the costs associated with increases in extreme weather (droughts and floods), impacts from sea level rise, limits on the availability of water resources, and other climate impacts.
4. EPA’s regulatory actions are not a form of backdoor cap and trade or an energy tax.
Congress rejected a comprehensive cap-and-trade approach to regulating GHG in its last session. EPA’s approach does not rely on a cap-and-trade regime and is far from comprehensive. EPA’s regulations focused first on the transportation sector with the issuance of widely supported standards for light-duty vehicles and proposed standards for medium and heavy-duty vehicles. On the stationary source side, EPA first targeted the largest new sources and major modifications of existing sources and recently announced plans to develop new source performance standards for the electric utility and refinery sectors. Such standards are the traditional approach used under the Clean Air Act and are generally implemented through state programs.The regulations are being developed on a timeframe consistent with Clean Air Act requirements covering other pollutants to allow covered sources the flexibility of developing compliance plans that cost-effectively meet a comprehensive set of requirements.
5. EPA is not attempting to meet the same reduction requirements that were rejected by the last Congress.
The House-passed climate change bill called for reductions in GHG emissions of 17 percent of 2005 levels by 2020, increasing to reductions of over 80 percent by 2050. EPA’s use of the Clean Air Act is not likely to produce emission reductions of the magnitude or in the timeframe set forth in the legislation proposed last year.
6. Important questions do need to be addressed in moving forward.
EPA’s initial set of regulations represent an important beginning in addressing the risks associated with climate change but also raise important issues. In moving forward, several questions will need to be addressed:
* How will EPA’s regulation be implemented in a manner consistent with current and future state actions?
* Given market forces driving utilities toward increased use of natural gas, the regulatory uncertainty that currently exists, and the age and fuel mix of the current utility fleet, what is the likely future role of coal in this sector?
* As EPA moves forward in regulating stationary sources through the use of emission performance standards, how might it be able to provide flexibility to regulated sources to achieve cost-effective reductions?
* How might EPA regulatory actions specific to utilities interact with possible Congressional interest in a clean energy standard?
Steve Seidel is Vice President for Policy Analysis
By Eileen Claussen
December 20, 2010
2010 was a year of highs and lows.
On the high side were global temperatures; 2010 will mark the hottest year in recorded history. At the start of the year, there was also the short-lived high of thinking we might be on the precipice of meaningful action in the U.S. Congress to protect the climate. Finally, at year’s end the climate talks in Cancún delivered (surprise!) tangible results in the form of agreement on key elements of a global climate framework.
But alas, the lows won out for most of 2010 as a trumped-up email controversy, continuing economic unease, and growing anti-government sentiment in the United States undermined the effort to forge lasting climate solutions at all levels.
Congress. Until quite recently, the Pew Center and many others were actively supporting cap and trade as the number-one climate policy solution. After the House passed a fairly comprehensive energy and climate bill in June 2009 that had a cap-and-trade system at its core, we actually thought that it might become the law of the land.
Before long, however, it became eminently clear that the Senate would not be able to pass a similar bill. The 2010 U.S. elections, which brought more doubters of climate change into the halls of Congress, only made it clearer that comprehensive climate action is off the table for now.
EPA. With Congress unable to pass comprehensive climate legislation in 2010, attention turned to what EPA might be able to do under existing authorities. And it turns out that EPA can do quite a lot by taking reasonable steps that have garnered critical support from the business and environmental communities. In late October, for example, the agency announced a sensible proposal to reduce greenhouse gas emissions and improve fuel efficiency for medium and heavy-duty vehicles. This was followed by a November announcement that will go a long way to making sure that new industrial facilities use state-of-the-art technologies to boost efficiency and reduce emissions.
Of course, opponents of these and other EPA regulations will surely raise a ruckus, and there will be loud cries in Congress to delay the regulations and even cut funding for the EPA. But the possibility remains that the agency could conceivably begin to chip away at U.S. emissions in the months and years ahead.
State Actions. Looking beyond Washington, state capitals were the focus of creative thinking and leadership on the issue of clean energy in 2010. Massachusetts, for example, set a statewide energy efficiency standard in 2010 supported by $1.6 billion in incentives. Meanwhile, California voters upheld the state’s greenhouse gas reduction law by defeating Proposition 23. This marked the first direct vote on addressing climate change in the United States, and it won in an overwhelming fashion.
But the overall story regarding climate action in the states was more mixed. While several regional climate initiatives continued to push forward, the November elections brought to the nation’s statehouses a group of new leaders who adopted strong stands against climate action in their campaigns. We will stay tuned to see how their campaign rhetoric translates into governing.
International. The agreement reached by international negotiators in Cancún in December closed out 2010 on a positive note. The Cancún Agreements import the essential elements of the 2009 Copenhagen Accord into the U.N. Framework Convention on Climate Change, including a stronger system of support for developing countries and a stronger transparency regime to better assess whether countries are keeping their promises. The Cancún Agreements also mark the first time that all of the world’s major economies have made explicit mitigation pledges under the Convention.
Of course, the ultimate goal of the continuing international talks should be a legally-binding climate treaty, but in Cancún we saw countries agreeing on incremental steps that will deliver stronger action in the near term and lay the foundation for binding commitments down the road.
Looking Ahead. Looking ahead, I believe 2011 holds promise only if those of us who support climate action can learn from what happened in 2010. In recent years, domestic and international efforts largely centered on a “big bang” theory of trying to achieve everything at once. Instead, it’s instructive now to take a cue from Cancún and accept that a step-by-step approach to building support for climate solutions offers our best shot at progress.
Calling on the new Congress to pass cap and trade or similarly comprehensive solutions will be a nonstarter, for example. But there may be an opportunity on Capitol Hill for less sweeping steps to reduce U.S. emissions.
Supporters would do well to spend the next several months laying the groundwork for incremental solutions by strengthening communications with the public. We need to do a better job of helping people understand both the risks and the opportunities presented by climate change. In the same way we buy fire insurance to protect against an event that has a statistically small chance of happening but would result in severe damage, acting now to cut emissions reduces our vulnerability to severe events that are likely to become more common in a warming world. And the success of the “No on Prop 23” campaign in California suggests that there remains a healthy appetite among the general public and in the business community (which provided substantial support for the effort) to back well-framed climate solutions.
After a year of highs and lows, we still must aim high in our efforts to address one of the greatest challenges of our time. But we should also heed the lessons of the past year and work for more modest victories now that can keep us on the path to longer-term solutions.
Front-Line City in Virginia Tackles Rise in Sea -- The New York Times, Nov. 25
Last house on sinking Chesapeake Bay island collapses -- The Washington Post, Oct. 26
Flood Plan proposed to protect Washington Mall -- The Washington Post, Nov. 15
Maybe climate change has fallen off the radar screen at both ends of Pennsylvania Avenue, but these recent headlines from The Washington Post and The New York Times suggest that the issue hasn’t gone away. No, these stories aren’t straight out of some scary futuristic sci-fi movie (anybody remember the truly dreadful 1995 movie Waterworld starring Kevin Costner?). Nor are they based on some forecast for a distant future year spit out by a supercomputer. They simply report on real events, happening today, right here in our region. They provide a clear and present warning of the economic costs and human suffering that will increasingly be in the news if we fall to address climate change.
On November 10, 2010, the Environmental Protection Agency (EPA) released guidance to be used in implementing “best available control technology” (BACT) requirements for greenhouse gas (GHG) emissions from major new or modified stationary sources of air pollution. Under the Clean Air Act (the Act), major new sources or major modifications to existing sources must employ technologies aimed at limiting emissions from these sources.
Under the Act, the BACT requirements for a given facility are to be established in a way that addresses the specific conditions of the facility and reflect the maximum degree of emission reduction that has been demonstrated through available methods, systems, and techniques, while accounting for the economic, energy and environmental considerations of the facility. In most states, the state environmental agency, rather than US EPA, will be issuing the permit to the facility.
The use of BACT to limit emissions of regulated pollutants from facilities has been part of the Clean Air Act for decades. Its first application to GHG emissions occurred in February 2010, when Calpine Corporation voluntarily agreed to an air permit that included a BACT determination for GHGs at a new power plant in California. The approved power plant included a slightly more efficient generation unit than had been initially proposed.
The new EPA guidance itself is technical in nature. Most importantly, under the guidance, covered facilities will generally be required to use the most energy efficient technologies available – much as was the case with the Calpine facility – rather than be required to install particular pollution control technologies. Among other things, carbon capture and sequestration technology will not be considered BACT except in extremely rare circumstances, such as when a facility is located next to an operating oil field whose operator wants to purchase carbon dioxide for enhanced oil recovery. Nor will the guidance require that specific types of fuels be used. In particular it does not require that proposed coal burning power plants switch to natural gas. The guidance also includes particular guidance for biomass facilities, stating that biomass itself could be considered BACT. EPA has indicated that it intends possibly to pursue additional rulemaking next year that may eliminate biomass burning facilities altogether from this permitting process. Overall, the BACT guidance maintains the same steps for individual BACT determination for GHGs that have long been used for BACT determination for traditional air pollutants.
In an earlier rulemaking, EPA established the threshold limits for which major new or modified sources would be required to meet BACT requirements. In its “tailoring” rule, EPA specified that beginning January 2, 2011, only sources that were already subject to BACT for “criteria” air pollutants (such as sulfur dioxide and nitrogen oxides) and had emissions of GHGs that exceeded 75,000 tons per year would have to meet BACT for GHGs. In July 2011, these requirements will be extended to apply also to any new source with GHG emissions above 100,000 tons per year and any modified source that increases GHG emissions by more than 75,000 tons per year.
More information from C2ES:
Throughout this year I have posted a number of blogs on the record-breaking extreme weather events of recent years, particularly 2010. Events ranged from unprecedented blizzards on the U.S. East Coast to the cataclysmic Russian heat wave and flooding in Pakistan. The key message I’ve tried to communicate is that, rather than debating whether these particular events are being caused by climate change – an interesting academic question that is unanswerable on a practical level – we should learn from these events about our individual and societal vulnerabilities and the real costs of climate change.
In an op-ed in The New York Times, Jack Hedin, a Minnesota farmer, offers an excellent example of the type of practical learning I’m talking about:
“The past four years of heavy rains and flash flooding here in southern Minnesota have left me worried about the future of agriculture in America’s grain belt. For some time computer models of climate change have been predicting just these kinds of weather patterns, but seeing them unfold on our farm has been harrowing nonetheless.”
Mr. Hedin’s family has farmed the soils of southern Minnesota since the late 19th century. Today he runs a small farm in Rushville, where an onslaught of extreme weather events over several years forced him to retreat to higher ground. This is an example of forced adaptation where abandonment was the best choice. But even in the new location, his farm lost $100,000 worth of crops to excessive soil moisture this summer.
Notice that Hedin doesn’t waste time worrying about whether particular weather events were caused by human-induced climate change:
“The weather in our area has become demonstrably more hostile to agriculture, and all signs are that this trend will continue. Minnesota’s state climatologist, Jim Zandlo, has concluded that no fewer than three “thousand-year rains” have occurred in the past seven years in our part of the state. And a University of Minnesota meteorologist, Mark Seeley, has found that summer storms in the region over the past two decades have been more intense and more geographically focused than at any time on record.”
Climate scientists know the climate is changing, that many mid-latitude locations are becoming wetter as a result (see figure below), and that we can expect that trend to continue. What does it matter whether a particular storm on a particular day in a particular year was caused by human intervention with the climate system? After all, it isn’t one particular event that has Mr. Hedin worried about the future of farming in America’s grain belt; it’s the preponderance of evidence that the climate is already shifting and the common sense realization that farming is getting harder because of that shift.
Please read Jack Hedin’s op-ed in The New York Times. He has the right idea about learning from extreme weather events.
Jay Gulledge is Senior Scientist and Director of the Science and Impacts Program
Statement on EPA’s issuance of guidance for Clean Air Act permitting for greenhouse gases.
Statement of Eileen Claussen
President, Pew Center on Global Climate Change
November 10, 2010
Today's announcement demonstrates that EPA can use the Clean Air Act in a sensible way to improve our nation's energy efficiency and to reduce greenhouse gas emissions. The guidance goes a long way to making sure that large new industrial facilities employ state of the art technologies that will deliver important long term economic and environmental benefits.
Pew Center Contact: Tom Steinfeldt, 703-516-4146