Reuters: As climate science advances, forecasts about the extent of future warming and its effects are likely to become less – not more – precise. That may make it more difficult to convince the public of the reality of climate change, but it hardly diminishes the urgency of taking action. I think I can predict right now the headlines that will follow publication of the next report from the Intergovernmental Panel on Climate Change (IPCC), due in 2013. "Climate scientists back off predicting …