In a few decades, the relationship between the environment, resources and conflict may seem almost as obvious as the connection we see today between human rights, democracy and peace.

If we gave up eating beef we would have roughly 20 to 30 times more land for food than we have now.

I see humanity now as one vast plant, needing for its highest fulfillment only love, the natural blessings of the great outdoors, and intelligent crossing and selection.

People blame their environment. There is only one person to blame - and only one - themselves.

We must return to nature and nature's god.

Why are ecologists and environmentalists so feared and hated? This is because in part what they have to say is new to the general public, and the new is always alarming.

I don't think we're going to save anything if we go around talking about saving plants and animals only we've got to translate that into what's in it for us.

I think the cost of energy will come down when we make this transition to renewable energy.

When a man wantonly destroys one of the works of man we call him a vandal. When he destroys one of the works of god we call him a sportsman.

Every time I have some moment on a seashore, or in the mountains, or sometimes in a quiet forest, I think this is why the environment has to be preserved.