I guess some of us don't want to be depressed by the message, and that's understandable.
But ignoring the problem is certainly no solution.
Even more fascinating are the 8 segments of 'Arithmetic, Population, and Energy' by Dr. Albert Bartlett, physics mathematician at the U. of Colorado, Boulder.
http://www.youtube.com/watch?v=F-QA2rkpBSY&feature=channelAnd the Mencken philosophy presented in segment 7 (I think) that mankind's biggest failing is that they don't want to believe unpleasant truths, but will believe pleasant falsehoods.