Washington Post: The United States is not on track to meet its international commitment to cut greenhouse gas emissions by 2020, according to an analysis released Wednesday by the World Resources Institute. The new findings examine the impact of the U.S. energy and transportation sectors as well as sources such as methane releases from landfills. The study gives a pessimistic view of the future even though carbon emissions have fallen in recent years because of the economic downturn and increased use of natural...