Sigh... an interesting article.  I believe I can grasp the basic physics of it, though I lack the math skills to see the results for myself.  

The only thing that raises my hackles is the very first sentence.  "A lot of people deny climate change."  Wrong, Mr. Mooney.  I would venture that most "climate deniers" are merely denying that AGW is the sole cause - AND - that giving the government more control and taxation power over us serfs, will save us from ourselves.

We know the climate is changing.  Any grade school science book can show you that.  I'm old enough to see and feel the effects myself.  But I strongly reject that "carbon taxes" and "offsets" and destroying entire industries (like coal) is going to make an iota of difference.  Humans will have to move and adapt, that's all there is to it.