After a lead diver in the Thai cave rescue Vern Unsworth told Elon to "stick his submarine where it hurts" and described it as a PR stunt, Musk branded him a "pedo guy" on Twitter, where the tech billionaire has 22 million followers. He now faces the prospect of being sued for this so far unjustified slur. In addition, his green credentials have been called into question after it was revealed he donated thousands to climate change denier Trump's presidential campaign in 2016.