according to the Union of Concerned Scientists refining *3000 tons* 1,430,000 tons of coal Union of Concerned Scientists Coal lifecycle When we burn coal 50 percent more of it coal power plant refining Union of Concerned Scientists "How Coal Woks" refining refining Union of Concerned Scientists: How Coal Works refining Union of Concerned Scientists How Coal Works refining 5 billion kilowatt-hours annual carbon dioxide emissions refining these figures about 40-90% carbon by weight How Coal Works | Union of Concerned Scientists UCS How Coal Works | Union of Concerned Scientists