The nature of human beings is that they'd far rather face the disaster that is happening tonight than the one that is happening tomorrow.

No one will protect what they don't care about, and no one will care about what they have never experienced.

The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.

Instead of controlling the environment for the benefit of the population, perhaps we should control the population to ensure the survival of our environment

What humans do over the next 50 years will determine the fate of all life on the planet.

Anyone who believes in indefinite growth on a physically finite planet is either mad or an economist

The World is full of wonders, but they become more Wonderful, not less Wonderful when Science looks at them.

The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?

How could I look my grandchildren in the eye and say I knew what was happening to the world and did nothing.

Bringing nature into the classroom can kindle a fascination and passion for the diversity of life on earth and can motivate a sense of responsibility to safeguard it.

I just wish the world was twice as big and half of it was still unexplored.

I always remember the prayers of my mother as they always forever.

holes are interesting. there are books about holes.

I still climb Mount Everest just as often as I used to. I play polo just as often as I used to. But to walk down to the hardware store I find a little bit more difficult

Instead of competing, all we have to do is create.

The United States of America has no intention of finishing second in space. This effort is expensive-but it pays its way for freedom and for America.

But in my mind I've always been a solo artist- I've just been working with a lot of great people like Kanye and Alicia Keys and Jay-Z.

Every poem that I write is, in a sense, trying to find adequate words for this unspeakable word, around which my entire life turns.

I believe that if we are going to write about life and death, we should not do it from the cheap seats.

Waiting is a trap. There will always be reasons to wait. The truth is, there are only two things in life, reasons and results, and reasons simply don't count.

We are selected, but I grew up in California and in San Francisco and there was a system of electing judges.