People blame their environment. There is only one person to blame - and only one - themselves.

By polluting clear water with slime you will never find good drinking water.

It seems that every time mankind is given a lot of energy, we go out and wreck something with it.

I have a private plane. But I fly commercial when I go to environmental conferences.

Unless we keep this planet healthy, everything else is for naught.

Our world faces a true planetary emergency. I know the phrase sounds shrill, and I know it's a challenge to the moral imagination.

The only way forward, if we are going to improve the quality of the environment, is to get everybody involved.

Much of the debate over global warming is predicated on fear, rather than science.

We don't have to sacrifice a strong economy for a healthy environment.

You may be able to fool the voters, but not the atmosphere.