Never before have we known what we know.

For humans, the Arctic is a harshly inhospitable place, but the conditions there are precisely what polar bears require to survive - and thrive. 'Harsh' to us is 'home' for them. Take away the ice and snow, increase the temperature by even a little, and the realm that makes their lives possible literally melts away.

This much is certain: We have the power to damage the sea, but no sure way to heal the harm.

There is an enormous amount to be learned about the sea; like most wildernesses, it has great potential.

Humans are the only creatures with the ability to dive deep in the sea, fly high in the sky, send instant messages around the globe, reflect on the past, assess the present and imagine the future.

Never before have we known what we know.

If I seem like a radical it's because I have seen things that others have not.