A book came out recently written by scientists and environmentalists that made me so angry. It said the only thing we have to worry about is big industry. Each individual who tries to make his or her own environment better is useless. I find this criminal, because then you have a billion people all saying, It doesn't matter what I do because I'm just one person. But if you turn that around and a billion people say, What I do does make a difference, then it will make a difference.

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

It's up to us to save the world for tomorrow: it's up to you and me.

If you educate women, family size tends to go down.

War had always seemed to me to be a purely human behavior. Accounts of warlike behavior date back to the very first written records of human history; it seemed to be an almost universal characteristic of human groups.

Young people, when informed and empowered, when they realize that what they do truly makes a difference, can indeed change the world.

If you work hard and be persistent, you will achieve whatever you want to do.