The ties between the deniers and those interests are well known and well documented. Heartland has received more than $1 million from ExxonMobil together with foundations linked to the Koch brothers and the late conservative funder Richard Mellon Scaife. Just how much money the think tank receives from companies, foundations, and individuals linked to the fossil fuel industry remains unclear because Heartland does not publish the names of its donors, claiming the information would distract from the “merits of our positions.” Indeed, leaked internal documents revealed that one of Heartland’s
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