en.wikipedia.org http://en.wikipedia.org/wiki/Coal_power_in_the_United_States heating furnace America have a few issues with mercury coal heating furnace According to Wikipedia This Wikipedia article most widely used input Coal power in the USA half of the nation's electricity grid Wikipedia - Coal power in the U.S. thirty-nine percent of our electricity have a few issues with mercury 1.58 million thousand megawatt hours of electricity in 2013 http://en.wikipedia.org/wiki/Coal_power_in_the_United_States US was from coal have a few issues with mercury percentage of the grid that they represent 1.58 million thousand megawatt hours of electricity in 2013 account for nearly 50% of our electric generation about half This Wikipedia article backbone of electricity production in the United States Coal Power in the United States half it ain’t unicorn farts have a few issues with mercury 90% of coal mined in the U.S thirty-nine percent of our electricity 1.58 million thousand megawatt hours of electricity in 2013 half of the nation's electricity grid United States list of dirtiest power plants http://en.wikipedia.org/wiki/Coal_power_in_the_United_States half of the nation's electricity grid Clean Air Watch half 90% of coal mined in the U.S account for nearly 50% of our electric generation half of the nation's electricity grid Carbon footprint: CO2 emissions 90% of coal mined in the U.S 1.58 million thousand megawatt hours of electricity in 2013 coal "Coal power in the United States," 1.58 million thousand megawatt hours of electricity in 2013 coal half of the nation's electricity grid en.wikipedia.org...