Here is my canned Global Warming response:
When I was in school, I learned about the impending Ice Age (no, not the movie). My kids will/are learn/ing about the impending Global Warming. I guess my grandkids will learn about the impending Ice Age again.
Reminds me of the line from 1984: "We are at war with Oceana, we have always been at war with Oceana." Except, that we have not always been at war with Oceana, and we have not and will not always be at risk of Global Warming. Wait a few years and we can all fear an Ice Age again.
I do agree that the climate could be shifting. I am just not so sure humans have a lot, if anything, to do with it.
MotionMan