I can remember when the air was clean and sex was dirty.

You can't make positive choices for the rest of your life without an environment that makes those choices easy, natural and enjoyable.

I'm old enough to remember when the air over American cities was a lot dirtier than it is now.

It's obvious that the key problem facing humanity in the coming century is how to bring a better quality of life - for 8 billion or more people - without wrecking the environment entirely in the attempt.

The education of women is the best way to save the environment.

If a man walks in the woods for love of them half of each day, he is in danger of being regarded as a loafer. But if he spends his days as a speculator, shearing off those woods and making the earth bald before her time, he is deemed an industrious and enterprising citizen.

The real threat to whales is whaling which has endangered many whale species.

Approximately 80% of our air pollution stems from hydrocarbons released by vegetation, so let's not go overboard in setting and enforcing tough emission standards from man-made sources.

The one process now going on that will take millions of years to correct is the loss of genetic and species diversity by the destruction of natural habitats. This is the folly our descendants are least likely to forgive us.

Destroying rainforest for economic gain is like burning a Renaissance painting to cook a meal.

Water and air, the two essential fluids on which all life depends, have become global garbage cans.

Climate change is a terrible problem and it absolutely needs to be solved. It deserves to be a huge priority.

It's really kind of cool to have solar panels on your roof.

We are in danger of destroying ourselves by our greed and stupidity. We cannot remain looking inwards at ourselves on a small and increasingly polluted and overcrowded planet.

Be careful the environment you choose for it will shape you, be careful the friends you choose for you will become like them.

Complete adaptation to environment means death. The essential point in all response is the desire to control environment.

Politics is the art of controlling your environment.

We won't have a society if we destroy the environment.

The harder the circumstances the more trying the environment the stronger are those who come out of those circumstances.

We begin to see therefore the importance of selecting our environment with the greatest of care because environment is the mental feeding ground out of which the food that goes into our minds is extracted.