Ernest J. Moniz: “Let these guys prove it. And if not, well, they and their investors will lose the money.”

Dependence on 100% renewables is not yet realistic and certainly not cost effective.

We need to really think about addressing our security and our climate issues in an integrative way.

Coal will remain an important component of the nation's energy mix for decades.

I strongly support your focus on Federal buildings, and I would urge going further to have energy efficiency programs.