Renewable energy is proven technology, the price is dropping, the rest of the world is going that way, that's where our investment should be going as well.

The pursuit of eternity is no longer the prerogative of the gods - it is the business of us all, here and now.

Whereas our common past, out of Africa, saw a global diaspora of humankind, our common future depends on a global coming together and consensus, resulting in a more equitable distribution of the Earth's largesse. When Africa, which gave us the wealth of life, has that debt returned, the world will have come of age.

We are all born bonded to nature; that's why we put depictions of flowers and forests, rather than bulldozers or log piles, on our walls.

I didn't want to be a shock absorber; I wanted to deliver the shock.

I'm worried about the traditional media, but I think the new media is a plus for democracy.

The reality is that if we in this rich, lucky quarter of the planet cannot make a stand for the 30 million other species we share this planet with, let alone our own species, then who can?