All the time I feel I must justify my existence.

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.

Forests are the world's air-conditioning system-the lungs of the planet-and we are on the verge of switching it off.

Climate change should be seen as the greatest challenge to face man and treated as a much bigger priority in the United Kingdom.

I learned the way a monkey learns - by watching its parents.

My Rainforests Project ... has three main elements. Firstly, to determine how much funding the rainforest countries need to re-orientate their economies so that the trees are worth more alive than dead.

Organic farming has been shown to provide major benefits for wildlife and the wider environment. The best that can be said about genetically engineered crops is that they will now be monitored to see how much damage they cause.