Interesting news came out of Google yesterday.

We just completed a substantial 20-year green Power Purchase Agreement that allows us to take responsibility for our footprint and foster true growth in the renewable energy sector. On July 30 we will begin purchasing the clean energy from 114 megawatts of wind generation at the NextEra Energy Resources Story County II facility in Iowa at a predetermined rate for 20 years. Incorporating such a large amount of wind power into our portfolio is tricky, but this power is enough to supply several data centers.

By making such a long term committment Google is "giving the developer of the wind farm financial certainty to build additional clean energy projects."

Image Credit: Reed B Thatcher aka rbthatcher over at Threadless