Observer - Now the Pentagon tells Bush: climate change will destroy us

I’m not sure what to make of this: A “secret report” from the pentagon warning Bush that climate change will destroy us. There will be riots, nuclear war and Britain will have a Siberian climate by 2020. Another article details how, by 2007, violent storms will smash coastal barriers rendering large parts of the Netherlands inhabitable.  I truly believe climate change is a major threat but this sounds more like a leaked Hollywood script than a classified pentagon document.