Agence France-Presse: The US Environmental Protection Agency (EPA) shifted course Friday by deeming carbon dioxide and other greenhouse gases a health risk, in a landmark turnaround that could impact climate change regulation. “After a thorough scientific review ordered in 2007 by the US Supreme Court, the Environmental Protection Agency issued a proposed finding … that greenhouse gases contribute to air pollution that may endanger public health or welfare,” said an EPA statement posted on the agency …