(July 6, 2023, 12:52 PM EDT) -- WASHINGTON, D.C. — The U.S. Environmental Protection Agency’s decision to align aircraft emission standards with the standards of the International Civil Aviation Organization (ICAO) did not violate the Clean Air Act (CAA) and was not arbitrary and capricious because the agency has “substantial discretion” to regulate aircraft emissions, a District of Columbia Circuit U.S. Court of Appeals panel found in denying two petitions for review filed by a groups of states and the District of Columbia as well as three environmental organizations....