Interesting again, is the range of public challenges now extant to the Oscar hungry Gore: could it be that global warming has now fully morphed into climate change and emerged as a "newly-discovered" concern over pending societal doom and decay due to....well we don't really know but there's lots of candidates that pundits would have you blame, such as: Shock Capitalism (Naomi Klein), the End of Ingenuity (Thomas Homer-Dixon), an Assault on Reason (Gore) or George Bush (the mainstream media).
Alternatively, it could just be that the human race is in the midst of an unprecedented period of prosperity, technological innovation and democratic reform leading to unprecedented levels of life expectancy, human welfare and environmental quality.
Not perfect yet. Far from it. But better than at any other time in human history. Just maybe.