3 ms·

I'm more impressed by graphs like this: http://c3headlines.typepad.com/.a/6a010536b58035970c0134849d3d3f970c-pi http://c3headlines.typepad.com/.a/6a010536b58035

• lobster_johnson 14y ago
  The difference is that we generally know the reasons behind earlier climate changes. The medieval warming period, for example, was due to increased solar radiation [1]. It's not that there have not been lots of major climate change before; it's that this time it's caused by humans. [1] http://www.skepticalscience.com/medieval-warm-period.htm http://www.skepticalscience.com/medieval-warm-period.htm