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The impact of state-level actions to reduce global warming pollution is significant on a global scale. A review of dozens of individual state policies, federal policies based on state models, and new federal policies in which states will have key roles in implementation suggests that state actions will reduce carbon dioxide emissions by approximately 536 million metric tons by 2020. That is more global warming pollution than is currently emitted by all but eight of the world’s nations, and represents approximately 7 percent of U.S. global warming pollution in 2007.
The United States relies heavily on outdated technology and limited resources for most of its electricity needs. While the production of clean, renewable energy such as wind and solar power is growing, the vast majority of American electricity comes from burning fossil fuels—coal, oil, and natural gas—and from nuclear power.
