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

It is our collective and individual responsibility to protect and nurture the global family, to support its weaker members and to preserve and tend to the environment in which we all live.

The earth is what we all have in common.

There are no passengers on Spaceship Earth. We are all crew.

He that plants trees loves others besides himself.

Man must feel the earth to know himself and recognize his values….God made life simple. It is man who complicates it.

The Earth is the most powerful and energetic planet.

Take care of the earth and she will take care of you.

You must love the crust of the earth on which you dwell more than the sweet crust of any bread or cake; you must be able to extract nutriment out of a sand heap.

If you tickle the earth with a hoe she laughs with a harvest.