Proven reserves of oil, gas and coal represent four times the amount of carbon that would blow through the 2-degree C climate target (which no one really thinks is ‘safe’).  Burning just one quarter of those proven reserves will bring humanity to the 50-50 point of tipping into dangerous climate change said leading climate scientists in 2009. We need a plan to phase out emissions of carbon entirely they said in my article for IPS. — Stephen

“Only a fast switch away from fossil fuels will give us a reasonable chance to avoid considerable warming,” said Malte Meinshausen, climate researcher at the Potsdam Institute for Climate Impact Research.

See full article based on studies published in Nature:

Heading for +2 degrees C (3.6 degrees F) Carbon Use Must Peak by 2015 Scientists Warn