Avatar is the most high tech film in terms of its execution, dealing with essentially a very low tech subject; which is our relationship with nature...and in fact the irony is that the film is about our relationship with nature and how our technological civilization has taken us several removes away from a truly natural existence and the consequences of that to us.

If you wait until the right time to have a child you'll die childless, and I think film making is very much the same thing. You just have to take the plunge and just start shooting something even if it's bad.

Every time you dive, you hope you'll see something new - some new species. Sometimes the ocean gives you a gift, sometimes it doesn't.

You can have a strong economy or you can help the environment, but you can't do both at the same time. That's ridiculous. In fact, as a sustainable vision for a healthy economy has to involve changing our energy policy and changing with respect to the natural world. Because we're hitting nature's thresholds, we're hitting nature's limits with respect to water and crop yields and energy use and fossil fuels heating the atmosphere at the same time we're past global peak and running out of that.

Nature's not our enemy, it's our sustenance; and we need it - and we need nature healthy for us to be healthy and to survive long term

When the ship docks, I'm getting off with you. This is crazy. I know it doesn't make any sense, that's why I trust it.

I like the evening in India, the one magic moment when the sun balances on the rim of the world, and the hush descends, and ten thousand civil servants drift homeward on a river of bicycles, brooding on the Lord Krishna and the cost of living.