State Farm / Wolverine Power Supply Cooperative Inc. / Resources Defense Council Inc. / West Virginia Coal Association Inc. / Commerce Inc. / MCI / Norwest Bank Minn. / The Virginia Coal Association Incorporated / First Interstate Bank / Edgecombe Genco LLC / Sunflower Electric Power Corporation / Midwest Ozone Group / Spruance Genco LLC / Public Service Enterprise Group Inc. / SmithKline Beecham Corp. / Public Utilities / PPG Industries Inc. / Indiana Coal Council Inc. / AT&T / Whitman / Chase Power Development LLC / Entergy Corp. / U.S.A. Inc. / National Grid Generation LLC / Julander Energy Company / Chesapeake / Manufacturers Inc. / Kentucky Coal Association Inc. / Wisconsin Industrial Energy Group Inc. / FirstEnergy Generation Corporation / Utility Air Regulatory Group / Transmission Association Inc. / Peabody Energy Corporation / Central Bank of Denver / Oak Grove Management Company LLC / Riverkeeper Inc. / Tobacco Co. / Calpine Corporation / Patterson / White Stallion Energy Center LLC / Exelon Corporation / Chevron / /
Continent
America / /
Country
United States / /
Event
Product Issues / /
Facility
United States Court of Appeals / U.S. Court of Appeals / /
Holiday
Commonwealth Day / /
IndustryTerm
mineral processing machinery / mining / /
Organization
Tri-State Generation and Transmission Association / Virginia Coal Association / Georgia Association of Manufacturers / American Lung Association / Sierra Club / Chesapeake Bay Foundation / Resources Defense Council / Federal Bureau of Prisons / Indiana Chamber of Commerce / National Mining Association / United States Court of Appeals / American Public Health Association / American Nurses Association / Lignite Energy Council / Waterkeeper Alliance / Conservation Law Foundation / National Association for the Advancement of Colored People / US Federal Reserve / National Black Chamber of Commerce / FDA / Kansas City Board of Public Utilities / Ohio Environmental Council / Texas Commission on Environmental Quality / Environmental Defense Fund / United States Environmental Protection Agency / Institute for Liberty / Kentucky Coal Association / Kentucky Chamber of Commerce / West Virginia Chamber of Commerce / Puerto Rico Electric Power Authority / Virginia Chamber of Commerce / Physicians for Social Responsibility / Indiana Coal Council / Ohio Chamber of Commerce / West Virginia Coal Association / Congress / South Carolina Chamber of Commerce / Izaak Walton League of America / Texas Public Utility Commission / U.S. Court of Appeals / American Public Power Association / Natural Resources Council of Maine / Clean Air Council / Railroad Commission of Texas / American Academy of Pediatrics / FDIC / Gulf Coast Lignite Coalition / /
Person
Nat / Terry E. Branstad / Dustin McDaniel / Lisa Perez Jackson / Jack Conway / Gina McCarthy / /
Position
Administrator / Attorney General / Governor of the State of Iowa / /
Product
Air Pollutants From Coaland Oil-Fired Electric Utility Steam Generating Units / Standards / /
ProvinceOrState
Nebraska / West Virginia / Ohio / Minnesota / Virginia / Alabama / Alaska / Maine / North Dakota / Indiana / New York / Connecticut / Michigan / Missouri / New Mexico / Utah / District of Columbia / West / Rhode Island / South Carolina / Oklahoma / Mississippi / California / Arizona / Idaho / Texas / Kansas / New Jersey / Kentucky / Vermont / Rhode / Wyoming / Erie / Maryland / Illinois / Oregon / North / Columbia Circuit / Pennsylvania / South / Delaware / Florida / North Carolina / Iowa / New / Massachusetts / Arkansas / New Hampshire / /
QUESTION PRESENTED Whether an administrative agency, when authorized by Congress to regulate only if “appropriate,” can deem the cost of the regulation irrelevant, with the result that, by the agency’s own estimat