Ice ages have come and gone. Coral reefs have persisted.

We have found ways to capture, kill and market ocean wildlife on an unprecedented scale. It's an absolute catastrophe.

'Green' issues at last are attracting serious attention, owing to critically important links between the environment and the economy, health, and our security.

I love music of all kinds, but there's no greater music than the sound of my grandchildren laughing; my kids, too.

No water, no life. No blue, no green.

We humans have this idea that the ocean is so big, so vast, so resilient that it doesn't matter what we do to it. That may have been true 1,000 years ago. But in the last 100, especially the last 50 years, we have destroyed the assets that make our lives possible.

I've spent thousands of hours under water. And even in the deepest dive I have ever made, 2.5 miles (about 4 kilometers) down, I saw trash and other tangible evidence of our presence.