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Clean Air Act


Montana District Court Vacates EPA's 'Secret Science' Rule

The Environmental Protection Agency's (EPA's) "Secret Science" rule establishing new standards for consideration of certain "pivotal" scientific studies, which was slated to go into effect on Jan. 6 of this…


EPA Reinterprets ‘Ambient Air,’ Further Tweaks New Source Review 

The Environmental Protection Agency (EPA) has finalized a change to a long-standing policy interpreting “ambient air”—a foundational concept under the Clean Air Act that applies to all types of air…


EPA’s Final Regional Haze Guidance Highlights State Discretion, Flexibility

New guidance issued by the Environmental Protection Agency (EPA) on Aug. 20 to help states prepare for the second implementation period of the federal regional haze program puts emphasis on…


Clean Air Act Issues Congress Could Grapple With in New Session
emissions-carbon-dioxide

While the Republican-led U.S. House and Senate in the 115th Congress was mainly focused on reviewing, for modification or repeal, several environmental rules issued under the Clean Air Act (CAA),…


The Impact of Environmental Regulations on Power Generation

For many years, air pollution control (APC) rules and regulations have governed the design and economics of the world’s power generation fleet. These rules have had a tremendous impact, improving…