Risk Expert tells the Truth about Climate

When people say there's still hope or that the window of opportunity is closing, there's a misunderstanding of our situation at the most fundamental level. Since James Hansen said that humanity faces the equivalent of a direct impact by a giant asteroid in his 2012 TED talk, look at the graph to see what has happened to atmospheric CO2. 30.5 parts per million (240 billion tonnes) of carbon dioxide has been added to the atmosphere in just those 13 years, plus vast amounts of other greenhouse gases. For context, 100 ppm of CO2-equivalent caused around 7°C, possibly 8°C, of global warming during the last deglaciation.

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