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  • 3M plant in Illinois was nation's worst emitter of climate-killing ‘immortal’ chemical in '21

    3M's chemical plant in Cordova, Illinois released 73 tons of perfluoromethane (CF4) into the atmosphere, more than any other industrial facility in the country, in 2021. CF4 is 7,380 times more potent than carbon dioxide as a greenhouse gas and remains in the atmosphere for 50,000 years. Credit: Phil McKenna