Using Public Lands to Develop Clean Energy?

More from President Obama's State of the Union:

"I’m directing my administration to allow the development of clean energy on enough public land to power 3 million homes.  And I’m proud to announce that the Department of Defense, working with us, the world’s largest consumer of energy, will make one of the largest commitments to clean energy in history -– with the Navy purchasing enough capacity to power a quarter of a million homes a year."

The Federal Government owns nearly 650 million acres of land - that means almost one third of all the land area of the United States qualifies as "public land". Public lands include National Parks, National Forests, and National Wildlife Refuges. 

So what kind of development are we talking about - thermal, wind, natural gas? Every state has some public lands, but most of the acreage is out West, so I'm guessing that's where the focus will be.