On August 3, 2015, President Obama and EPA announced the Clean Power Plan: a historic and important step in reducing carbon pollution from power plants that takes real action on climate change. The Clean Power Plan has been developed under the Clean Air Act, an act of Congress that requires the EPA to take steps to reduce air pollution that harms the public's health. Power plants account for nearly 40 percent of U.S. carbon dioxide emissions which is more than every car, truck, and plane in the U.S. combined and are responsible for the bulk of the pollution blamed for global warming. For decades, power plants have been allowed to emit unlimited amounts of carbon pollution. Today, the Clean Power Plan establishes state-by-state targets for carbon emissions reductions, and it offers a flexible framework under which states may meet those targets. When fully implemented, it will reduce the carbon dioxide emissions from the electricity sector by 32 percent from 2005 levels by 2030. The Clean Power Plan represents the most significant opportunity in years to help curb the growing consequences of climate change.