Facebook considers climate denialism an "opinion" and refuse to fact-check climate denying advertisers!
Facebook has decided to view climate denialism as just another “opinion”. This means that advertisement on the popular social networking site that pushes climate denialism doesn’t need to be fact-checked by experts. Climatewire reports (content is unfortunately behind a registration/paywall) that climate denialist groups, like “the CO2 Coalition”, are now pouring money into Facebook ads which says that “burning more fossil fuels would help humanity”.
Facebook is just horrible, boycott them if you aren't already.