Recently I was accused of not seeing the "other side" of global warming. While I agree that there are most definitely two (or more, many more) camps in the Global Warming debate, my belief is firm in that to do nothing is not an option.
Even if we grant that this current heating of the planet is the natural cycle, there are things you can do to make sure you are not as much of an impact on the natural environment. If you have never sat in the deep parts of any forest by yourself for at least an hour (as still as possible) so you can feel the rhythm of the earth and nature, then you are missing out on part of our human nature.
Anyhow, more fuel for your water cooler discussions can be found over here (link tip from kottke).