2°C - the amount of global warming to cause catasrophic climate change
565 - the gigatonnes of carbon pollution that would cause 2°C of warming
2,795 - the gigatonnes companies have ready to burn (in coal, gas and oil)
Obviously, the third number is a lot bigger than the second. McKibben compares this to drinking 30 beers and still intending to drive home (5 times over the limit). Clearly, this is a dangerous situation.
Meanwhile, companies are spending millions each day to find even more carbon to burn (to add to the 2,795). You can see why people are very very concerned.
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