Guardian: Carbon pollution levels are rising so fast that the world has no realistic chance of hitting ambitious climate targets set by Britain and the G8, an influential report to the Australian government has warned. The report, from economist Ross Garnaut, says existing carbon goals, such as those in Britain’s climate change bill, are based on out-of-date emissions figures, and are so ambitious that they could wreck attempts to agree a new global deal on global warming. Garnaut says …