Harvard scientists took Exxon’s challenge; found it using the tobacco playbook - Exxon’s peer-reviewed papers and internal communications acknowledged that climate change is real and human-caused, but Exxon’s paid “advertorials” expressed doubt that climate change is real and human-caused.

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Harvard scientists took Exxon’s challenge; found it using the tobacco playbook - Exxon’s peer-reviewed papers and internal communications acknowledged that climate change is real and human-caused, but Exxon’s paid “advertorials” expressed doubt that climate change is real and human-caused.