There is a natural greenhouse effect that contributes to warming. Greenhouse gases trap heat and thus warm the Earth because they prevent a significant portion of infrared radiation from escaping into space.

Eight years was awesome and I was famous and I was powerful.

The course of this nation does not depend on the decisions of others.

It is human choices that move events.

We can't impose freedom, but we can eliminate roadblocks to freedom, and to allow free societies to develop.

I think that if you don't think we're in a war that you can't win the war.

“Governments accountable to the voters focus on building roads and schools—not weapons of mass destruction.”