Cameron has a point by the way, in 2004 the Pentagon told Bush that 'Climate Change Will Destroy Us', but you can rely on Bush to ignore clear warnings. They did predict a 'Siberian Climate for the UK', which seems the trend judging by the current winter (but we all know climate is not the weather). Other rosey aspects they talked about where 'Nuclear conflict, mega-droughts, famine and widespread rioting will erupt across the world'. Here we are in 2010 and the Pentagon now considers Climate Change a security threat:
"For the first time, Pentagon planners in 2010 will include climate change among the security threats identified in the Quadrennial Defense Review, the Congress-mandated report that updates Pentagon priorities every four years."