I agree with you, but even if we were going through climate change to the extent that it would have these effects, there is no clear proof that this is caused specifically by human activity. Further, if we had the capacity to markedly lower CO2 levels, tomorrow, would it be smart to do that? Do we really know enough about climate science that we could be assured we wouldn’t screw ourselves by intervening?
Kerry was a C student in college http://usatoday30.usatoday.com/news/opinion/columnist/benedetto/2005-06-10-benedetto_x.htm , and despite his ‘progressive intellectual’ demeanor, has no credibility to be weighing in definitively about climate science.