Guardian: Boris Johnson is making long-term decisions that are in danger of making London less green, environmental and social campaigners say, as the new mayor reaches 100 days in office. The mayor had pledged to make London the greenest city in the world before the elections but London is rapidly losing its reputation for being at the cutting edge of dealing with environmental and social problems, said Darren Johnson, London assembly member. “Dumping the £25 emissions-based …