The proper use of science is not to conquer nature but to live in it.

Earth provides enough to satisfy every man's needs, but not every man's greed.

The clearest way into the Universe is through a forest wilderness.

Heaven is under our feet as well as over our heads

What you take from the earth, you must give back. That's nature's way.
Recycle the present, save the future
Green our planet - the best place on earth
The world is in our hands
Conserve the earth, it is the only one we have
Earth day: join the fight, do what's right