The US Supreme Court ruled Monday that the Environmental Protection Agency must consider greenhouse gases as pollutants, in a blow to the White House.
"Because greenhouse gases fit well within the Clean Air Act's capacious definition of 'air pollutant' we hold that EPA has the statutory authority to regulate the emission of such gases from new motor vehicles," the court ruled.
Led by Massachusetts, a dozen states along with several US cities and environmental groups went to the courts to determine whether the agency had the authority to regulate greenhouse gases such as carbon dioxide emissions.
