All you libs should love Google after this:
Official Google Blog: Carbon neutrality by end of 2007

Here is the funny part:

Our plan to neutralize Google’s carbon footprint includes three basic strategies:
- reduce energy consumption by maximizing efficiency;
- invest in and use renewable energy sources; and
- purchase carbon offsets for the emissions that we can’t reduce directly.

The first two are great business moves and will actually add value for Google. Purchasing carbon offsets is absolutely meaningless. Although I would love to be in the business of selling carbon offsets.