Guardian: Nick Stern hit the nail on the head today in Copenhagen when he argued that the current economic depression gives the world a unique, unrepeatable opportunity to tackle climate change and poverty. The resources that we need to transform the global economy, he explained – raw materials, skilled labour and industrial capacity – are now far more available, and at a far lower cost, than they were during the boom years, and we should use them. Some may be dismayed at his prediction that …