As the EPA has slowly been crafting its new rules to regulate global-warming emissions, one of the crucial first steps has involved getting a basic sense of where the pollution’s actually coming from.
Back in 2009, the agency required all large greenhouse-gas emitters — any power plant, refinery, or other facility that puts out more than 25,000 metric tons per year — to report their emissions. And today the EPA has unveiled a interactive online map that lets people check out the major polluters in their area (the emissions data are all from 2010).
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