Mr. Shirley states, " ... the advent of the Industrial Revolution have badly skewed the natural system ..."  Does that imply that we should repudiate the Industrial Revolution and go back to some sort of 16th C. level of agrarian pastoralism?  Second question:  If we do, will Mr. Shirley feel happy and fulfilled, walking around behind a pair of mules for 10 or 12 hours per day to keep his family fed, instead of doing whatever it is he does for a living now?  ;-)

"To deny that we are responsible is to doom future generations ..."  Figures on the web (Joe Romm's blog) suggest that the U.S. historically has produced 
about 29% of the atmospheric CO2 (as a byproduct of modern technology which won a world war and feeds a few billion people).  Yet Mr. Shirley implies that we are 100% responsible for the 'cleanup'.  Shouldn't the other 71% of the problem also be addressed??  (Just wondering ...)