US EPA Green House Gases

June 26, 2012 - 2:05 PM
FILE - In this Dec. 19, 2009 file photo, demonstrators hold a picture of President Barack Obama and signs during a demonstration outside the Bella Center, the venue of the U.N. Climate Conference in Copenhagen, Denmark. A federal appeals court on Tuesday upheld the first-ever regulations aimed at reducing the gases blamed for global warming. (AP Photo/Peter Dejong, File)