Terrorism is an immediate problem that people are very concerned about, and I am as concerned about that as anyone else. But it isn't an either or situation.

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.

Surprise is where creativity comes in.

If our political leaders are to be always a lot of political merchants, they will supply any demand we may create. All we have to do is to establish a steady demand for good government.

Hold on to me: Someday I may be quite valuable.

I think the universal theme would be love and relationships and how if you really want to live and be alive that that's proven through the amount of love you give and receive.

I came to California and got signed at a young age. And it's not like you see in the movies, where you start rubbing shoulders with Timbaland and Pharrell, and you become a giant pop star.

When you ask my three year old if my iPhone is too complicated, it's not. It's all relative.

A prince indebted is a fortune made.

I'm really glad to have made a movie that way on Superbad, because I learned a lot about what can be done and what the limitations are.

Political correctness kills discussion.

I did a lot of reading of the Bible and became fascinated with the idea of the Rapture. It's pretty wild. I hadn't heard of it until I was in college.