I am an ardent recycler. I would like to think that it works. I don't know whether it does or not.

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.

Imagine – hundreds of years of constant learning. It’s truly amazing.

If we let things terrify us life will not be worth living.

When many astronauts go to space, they see the insignificant size of the earth and vastness of space, and they become very religious, because they have seen the Signs of Allah.

Political promises are much like marriage vows. They are made at the beginning of the relationship between candidate and voter, but are quickly forgotten.

In fact, every one of us - every nation, every individual begins hundreds, perhaps thousands of years prior to the date that appears in the passport.

If you see it in your mind, you will hold it in your hand.

The earth does not need new continents, but new men.

As an actor, you've got to maintain a bit of mystery and at least part of your private life, otherwise the game is up.

I wasn't really asleep I was just meditating on unconsciousness.

You don't make your character in a crisis, you exhibit it.