For the next decade — as the emerging science was becoming increasingly robust, and as international efforts to curb heat - trapping emissions gained steam and calls for action grew more urgent — the company persisted in emphasizing
the lingering uncertainties of climate science and the costs of ambitious policies, the documents show.
Starting with the negotiations leading to the Kyoto Protocol
climate treaty in 1997, it has promoted the idea that
lingering uncertainties in
climate science justify delaying restrictions on emissions
of carbon dioxide and other heat - trapping smokestack and tailpipe gases.