from that article...
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Exxon had a secretive research program too. In 1981, one of its managers, Roger Cohen, sent an internal memo observing that the company’s long-term business plans could “produce effects which will indeed be catastrophic (at least for a substantial fraction of the earth’s population).”
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Now go to that article and click on the "internal memo" link...Exxon knew that CC represented a genuine and serious threat to the planet, yet they embarked on a disinformation campaign...you are one of its victims.