The U.S. Army's new (but still unfinished) solar plant at Ft. Irwin in the California desert

You can read about it here. Note how the army frames their reasons for deciding to build a solar plant of this type - all practical, nothing to do with global warming. I've often written that environmental projects and initiatives need to be framed in two ways to get a maximum of support - global warming and saving the environment for those that care about the issue, and national security and practicality for those that don't.

In the army's case, its power in this area comes from "diesel generators with long, vulnerable lines back to the fuel source", which makes solar a much more secure choice, at least for the next 5 billion years. Better to have your power coming in from above than from the side.