Energy conservation is one of Google's big initiatives. Eric Schmidt gave an extremely thought-provoking speech about it recently at the Commonwealth Club in San Francisco, which I heard on public radio. (Streaming audio available on the Commonwealth Club site [radiotime.com]. Unfortunately, there apparently is no permalink).
The talk is also available on YouTube...
Eric Schmidt at Commonwealth Club
[youtube.com...]
Schmidt has clearly done the math on energy costs, and presents a very encouraging view of conservation and renewables.
[edited by: Robert_Charlton at 1:57 am (utc) on Oct. 22, 2008]