The U.S. Environmental Protection Agency (EPA) is among the federal agencies charged with protecting human health and the environment. In 2007, the Supreme Court ruled in Mass v. EPA that the agency has authority under the Clean Air Act to regulate greenhouse gases, which contribute to climate change.
To date, major actions taken by EPA to protect the climate include an endangerment finding  setting the stage for greenhouse gas regulation; new standards to significantly reduce emissions from new cars; and proposed standards to reduce carbon pollution from new power plants.
Below are links to detailed information on current or proposed rules that directly or indirectly help to reduce greenhouse gas emissions.
Regulations affecting all sectors of the economy