The earth's climate may be heating up less in response to greenhouse-gas emissions than was once thought. But that does not mean the problem is going away. Over the past 15 years air temperatures at the Earth's surface have been flat while greenhouse-gas emissions have continued to soar. The world added roughly 100 billion tonnes of carbon to the atmosphere between 2000 and 2010 - about a quarter of all the CO₂ put there by humanity since 1750, but as James Hansen, the soon to retire head of NASA's Goddard Institute for Space Studies, observes, "the five-year mean global temperature has been flat for a decade." By no means does this indicate that global warming is a delusion, notes the Economist. Temperatures in the first decade of the 21st century are almost 1°C above those of the first decade of the 20th. But it does mean that our models may not be accurate enough to pinpoint the pace and severity of global warming impacts. Read More:
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