Guardian: Heathrow protestors’ hopes of attracting the support of leading climate scientists in their bid to block the airport’s proposed third runway have suffered a major setback. Jim Hansen, director of Nasa’s Goddard Institute for Space Studies in New York, has told anti-aviation campaigners that their protests will not help the battle against global warming and do not deserve support. The news is a serious blow for those opposed to airport expansion. Hansen is one of the world’s mostly …