Graphic by Wade Fasano

Last time there was this much CO2 in the atmosphere was 3 million years ago, in the Pliocene era. What can that tell us about what we're in for?

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  • The world will probably keep warming.
  • Sea levels will probably keep rising.
  • Ice sheets will probably keep melting.
  • Saber-tooth tigers? NOT OUT OF THE QUESTION.
  • Okay, probably out of the question.


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