Climate activist Greta Thunberg is setting her sights on Facebook, urging the social media giant to take responsibility and curb the hate speech, conspiracy theories and lack of fact-checking that she says is rampant on the platform. In a Facebook post shared with her 2.6million followers, Thunberg, 16, wrote Wednesday that she was debating quitting the social media platform because she finds its 'lack of taking responsibility very disturbing.' 'I ...