A new study warns methane emissions in the United States are far higher than the government claims. According to Proceedings of the National Academy of Science, the United States released 49 million tons of methane in 2008, compared to an estimate of 32 million by the Environmental Protection Agency. The study’s co-author, Anna Michalak, said: “The total U.S. impact on the world’s energy budget is different than we thought, and it’s worse.”