Two major news stories this week cast serious doubt on that conventional wisdom (which, to be fair to Posner and Sunstein, was a widely held view).  The first story is that 2012 was the hottest year on record in the United States by a significant margin.  Here’s how 2012 compares to earlier years:

We beat the old temperature record by more than a full degree Farenheit.  The second story is that natural disasters cost the world $160 billion this year, and the U.S. was hit harder than any other country, accounting for 67% of those losses.  Hurricane Sandy was, obviously, a big reason for the U.S. share but so was the searing drought in much of the country, affecting  80 percent of the country’s agricultural lands. According to the U.S. Department of Agriculture, the current drought is the worst since the 1950s.

And climate change didn’t just contribute to record droughts and to Hurricane Sandy (for a great explanation of why Hurricane Sandy was, in fact, caused by climate change see here).  2012 was also a terrible year for wildfires:  more than 9 million acres burned, only the third time in history we’ve passed that milestone.

Now it is possible, of course, that 2012 is an outlier year and the U.S. won’t continue to experience serious harm from climate change.  But scientific and business projections suggest otherwise.  Global insurance company Munich Re just reported that

Nowhere in the world is the rising number of natural catastrophes more evident than in North America.

And yet, well, what is there to say about our lack of response that hasn’t already been said?  Except that if not now, when?  What more will it take to provoke us to act?