The most important thing is to actually think about what you do. To become aware and actually think about the effect of what you do on the environment and on society. That's key, and that underlies everything else.

You're thinking about putting scientists into small cages and doing research on them. I wish it could happen sometimes.

I think we must cling to the hope that we can see in the great heroism, the bravery of the firemen and policemen, and the outpouring of caring and concern that has come pouring in from around the world.

Your life matters. You can't live through a day without making an impact on the world. And what's most important is to think about the impact of your actions on the world around you.

I think the most important thing to do is to be willing to listen, willing to care, and willing to admit mistakes and change your ways for the better!

I still think we are smart enough to not destroy planet Earth, our only home.

I get upset when so many people say there are all sorts of problems in Africa and India where they have these big families. They don't realize that 10 children in rural Tanzania will use less natural resources in a year than one middle class American child. People don't think like that.