Times (UK): AS a professor of earth sciences at Imperial College in the mid-1980s, Jeremy Leggett ran a research project on the geological history of the planet. His studies left him extremely concerned. ‘I got really worried about global warming and climate change – well ahead of it being fashionable,’ he said. ‘Everything I have done from then on has been trying to do something about that.’ Leggett left his teaching post determined to make a difference. He became an environmental …