Earth's Point of No Return? ; Researchers Fear We've Crossed 'Tipping Point' of Climate Change

Summary


"The magnitude of what we're talking about greatly, greatly exceeds anything we've withstood in human history."

- Peter deMenocal, associate professor at the Lamont-Doherty Earth Observatory of Columbia University

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Earth's Point of No Return? ; Researchers Fear We've Crossed 'Tipping Point' of Climate Change

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NOW THAT MOST scientists agree human activity is causing Earth to warm, the central debate has shifted to whether climate change is progressing so rapidly that, within decades, humans may be helpless to slow or reverse the trend.

This "tipping point" scenario has begun to consume many prominent researchers in the United States and abroad, because the answer could determine how drastically countries need to reduce their greenhouse gas emissions in the coming years. While scientists remain uncertai...

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