Thirty trillion dollars worth of services, scot-free to humanity, every year.

Destroying a tropical rainforest for profit is like burning all the paintings of the Louvre to cook dinner.

There can be no purpose more enspiriting than to begin the age of restoration, reweaving the wondrous diversity of life that still surrounds us.

Every kid has a bug period... I never grew out of mine.

I see no way out of the problems that organized religion and tribalism create other than humans just becoming more honest and fully aware of themselves.

Jehovah had nothing to say to Moses and the others about the care of the planet. He had plenty to say about tribal loyalty and conquest.

It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life - for 8 billion or more people - without wrecking the environment entirely in the attempt.