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Like summer’s satellite image of the melting Greenland ice sheet, a new report suggests time may be running out to temper the rising risks of climate change. "Turn Down the Heat: Why a 4°C Warmer World Must be Avoided," (pdf) (eBook version) warns we’re on track for a 4°C warmer world marked by extreme heat-waves, declining global food stocks, loss of ecosystems and biodiversity, and life-threatening sea level rise. Moreover, adverse effects of a warming climate are “tilted against many of the world's poorest regions” and likely to undermine development efforts and global development goals, says the study by the Potsdam Institute for Climate Impact Research and Climate Analytics, on behalf of the World Bank. The report, urges "further mitigation action...