Exxon Backs a Modest Carbon Tax, But Knows Only a Strong One Will Slow Climate Change

Concern about Canada regulating emissions from oil sands operations in 1991 led Exxon subsidiary Imperial Oil to study what level of a carbon tax would be needed to curb global warming. Photo credit: Mark Ralston/AFP/Getty Images By Karen Savage Newly discovered documents show that Exxon has known for decades […]

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