Capitalism doesn't function when it starts to contract, and we can see that quite clearly right here in the eurozone. It's like pushing a giant monster under water that's gasping for air. It goes nuts.

I don't want to see anything natural get hurt.

If you're trashing your own country, ruining the soils, contaminating the waters and the air, cutting down trees, overfishing the lakes, rivers and oceans, you're not much of a patriot.

Conservation is not without its critics and opposition. There are a lot of special interests that don't want to see land set aside.

Despite my great disappointment in American foreign policy, I am very proud of the American tradition of wild land conservation. It is the best tradition and example of land conservation in the world. It goes back a long way.

National parks are the best expression of social equity that there is. It's like paying our rent for living on the planet.