Daily Green: James Hansen, long an outspoken scientist warning of the dangers of doing nothing to stop global warming, has articulated a new position at odds with the scientific consensus stated by the United Nations’ Intergovernmental Panel on Climate Change. Rather than seeking to avoid a doubling of carbon in the atmosphere (compared to pre-industrial times) in order to avoid the worst consequences of global warming, Hansen suggests that the world has already passed this point. He says we’ve …