If we have a hope of really understanding our place in nature and of carving out a place for ourselves that is sustainable, it's primarily because of the new level of communication. It used to be, 'What you don't have in your mind, you have on your shelf.' But now we have the Web.

The Earth is a unique system in the universe, the only planet we know of that's hospitable for humankind.

It is not too late to turn things around.

There is not a well-funded campaign among scientists to say, "Look, here's the evidence. You can read it yourself. Here are the facts. We're not making this up."

The diversity of life on Earth, generally, is astonishing. But despite those large numbers, it's also important to recognize that every species, one way or another, is vulnerable to extinction. And in our time on Earth... our impact on the diversity of life has been profound.

In terms of personal choices, let's all think more carefully about where we get our protein from.

Like a shipwreck or a jetty, almost anything that forms a structure in the ocean, whether it is natural or artificial over time, collects life.