Guardian: Major international oil companies are buying off governments, according to the world's most prominent climate scientist, Prof James Hansen. During a visit to London, he accused the Canadian government of acting as the industry's tar sands salesman and "holding a club" over the UK and European nations to accept its "dirty" oil.
"Oil from tar sands makes sense only for a small number of people who are making a lot of money from that product," he said in an interview with the Guardian. "It doesn't...