New Scientist: Climate change is here, and the effects are already being felt across the US. That's the consensus of the Third National Climate Assessment, published today by the US Global Change Research Program. Drawn from a team of 300 scientists with input from 13 US government agencies and vetted by the National Academy of Sciences, the report leaves little room for debate over human-induced warming. Instead, the 831-page report catalogues the current impacts of climate change within the country and argues...