The sustainability revolution will, hopefully, be the third major social and economic turning point in human history, following the Neolithic Revolution - moving from hunter-gathering to farming - and the Industrial Revolution

Some recent occurrences such as the BSE disaster and even perhaps - dare I mention it - the present severe weather conditions in our country are, I have no doubt, the consequences of mankind's arrogant disregard of the delicate balance of nature. We have to find a way of ensuring that our remarkable and seemingly beneficial advances in technology do not just become the agents of our own destruction.

If you think about the impact of climate change, [it should be how] a doctor would deal with the problem. A scientific hypothesis is tested to absolute destruction, but medicine can't wait. If a doctor sees a child with a fever, he can't wait for [endless] tests. He has to act on what is there. The risk of delay is so enormous that we can't wait until we are absolutely sure the patient is dying.

I find myself born into this particular position. I'm determined to make the most of it. And to do whatever I can to help. And I hope I leave things behind a little bit better than I found them.

Forests ... are in fact the world's air-conditioning system-the very lungs of the planet-and help to store the largest body of freshwater on the planet ... essential to produce food for our planet's growing population. The rainforests of the world also provide the livelihoods of more than a billion of the poorest people on this Earth... In simple terms, the rainforests, which encircle the world, are our very life-support system-and we are on the verge of switching it off.

I believe passionately that everyone has a particular God-given ability.

We have spent the best part of the past century enthusiastically testing the world to utter destruction; not looking closely enough at the long-term impact our actions will have.