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

Something as curious as the monarchy won't survive unless you take account of people's attitudes. After all, if people don't want it, they won't have it.

Conservation must become before recreation.

We should be treating, I think, the whole issue of climate change and global warming with a far greater degree of priority than I think is happening now.

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

Scientists themselves readily admit that they do not fully understand the consequences of our many-faceted assault upon the interwoven fabric of atmosphere, water, land and life in all its biological diversity. But things could also turn out to be worse than the current scientific best guess. In military affairs, policy has long been based on the dictum that we should be prepared for the worst case. Why should it be so different when the security is that of the planet and our long-term future?

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.