The intersection of the Clean Air Act and energy policy: EPA's proposed greenhouse gas standards for existing power plants.

The article outlines the central features of the greenhouse gas emission reductions rule for existing fossil fuel-fired power plants published by the U.S. Environmental Protection Agency (EPA) which will affect the energy policy of the U.S. Topics include the rule providing the EPA the potential to exercise significant control over the economy, several building blocks and best system of emission reduction (BSER), and legal issues that have arisen due to the rule.