Climate disinformation leaves lasting mark as world heats

In 1998, as nations around the world agreed to cut carbon emissions through the Kyoto Protocol, America's fossil fuel companies plotted their response, including an aggressive strategy to inject doubt into the public debate.

Is it worth trying to sway the most staunch climate deniers?

Thanks to algorithms that learn about social media users' content preferences, Facebook timelines, Twitter feeds, suggested YouTube videos, and other news streams can look startlingly different from one person's online account ...

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