If you think about your and my grandchildren, this is what really worries me. I don't want them - if I'm still alive by then - to say, 'Why didn't you do something about it?', when you could have done.

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.

Be neither too remote nor too familiar.

As human beings we suffer from an innate tendency to jump to conclusions; to judge people too quickly and to pronounce them failures or heroes without due consideration of the actual facts and ideals of the period.

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

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.