U.S. EPA released its 20th Inventory of U.S. Greenhouse Gas Emissions and Sinks, which shows 2% increase in greenhouse gas (GHG) emissions in 2013 from 2012 levels and 9% drop since 2005. By sector and magnitude, largest contributors to total U.S. GHG pollution were power plants (31%), transportation sector (27%), and industry and manufacturing (21%). Increase was due to greater energy consumption across all sectors in U.S. economy and greater use of coal for electricity generation.