• There's so much pollution in the air now that if it weren't for our lungs there'd be no place to put it all.
• It isn't pollution that's harming the environment. It's the impurities in our air and water that are doing it.
• Thank God men cannot fly, and lay waste the sky as well as the earth.
• I'm not an environmentalist. I'm an Earth warrior.
• Take care of the earth and she will take care of you.
• Waste not the smallest thing created, for grains of sand make mountains and atomies infinity.
• The system of nature, of which man is a part, tends to be self-balancing, self-adjusting, self-cleansing. Not so with technology.
• Our modern industrial economy takes a mountain covered with trees, lakes, running streams and transforms it into a mountain of junk, garbage, slime pits, and debris.
• We're finally going to get the bill for the Industrial Age. If the projections are right, it's going to be a big one: the ecological collapse of the planet.
• In an underdeveloped country, don't drink the water, in a developed country, don't breathe the air.

There is sufficiency in the world for man's need but not for man's greed.

Nature provides a free lunch, but only if we control our appetites.

We never know the worth of water till the well is dry.