greenhouse gases

Power Plants Lead In Greenhouse Gas PollutionWashington state's major industrial sources released about 6 million more metric tons of greenhouse gases in 2013, a 30 percent jump from the previous year, according to the latest data from the U.S. Environmental Protection Agency.
Gov. Inslee Signs Order To Reduce Wash. Carbon EmissionsGov. Jay Inslee has signed an executive order that sets into motion a process to reduce carbon pollution in Washington state.
Study: Record Rise In Greenhouse Gases Occurred During Roman EmpireA recent European study found that a record rise in greenhouse gases happened during two centuries in which the Roman Empire and Han Dynasty were ruling the region.