https://www.theverge.com/2019/1/23/18194432/facebook-google-microsoft-libertycon-climate-change

Despite public warnings about the dangers of climate change, Facebook, Google, and Microsoft all supported a conference that promoted climate change denialism, according to a new report from Mother Jones.

The three companies were all sponsors of LibertyCon, a convention aimed at a libertarian audience that took place this month. The convention included a speaker from a group called the CO2 Coalition, who reportedly argued that the impact of climate change on the environment has been exaggerated.