Hansen: even 2 degrees sinks coastal cities

Politicians in Paris will try, if that’s not too kind a word, to find an agreement that will hold down temperature increases to 2 degrees C above pre-industrial levels [+2C].

Still too much, says James Hansen, of NASA (retired) and Columbia University, who has been warning us about this since 1981 or so:

• The last time Earth was +2C, 120,000 years ago, sea levels were 6-8 meters higher than today. 2 degrees would lock that in, the only question being how fast we would get there.
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