Guardian: As the economic crisis deepens, the worsening state of the environment is predictably losing prominence in politics, the media and public debate. It always happens: when times are good, green is good. When times get tough, out goes the green stuff. This time, however, it is different. The science has moved on. Climate change is no longer a matter of speculation and no longer can it be seen as a long-term concern to be ignored while we deal with more pressing economic shocks: although …