The world's forests need to be seen for what they are - giant global utilities, providing essential public services to humanity on a vast scale. They store carbon, which is lost to the atmosphere when they burn, increasing global warming. The life they support cleans the atmosphere of pollutants and feeds it with moisture. They act as a natural thermostat, helping to regulate our climate and sustain the lives of 1.4 billion of the poorest people on this Earth.

One of the main reasons for the conflict in Syria, and the terrorism that it's spawned, is climate change and drought.

The whole imposing edifice of modern medicine is like the celebrated tower of Pisa - slightly off balance.

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.

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.

Fast food may appear to be cheap food and, in the literal sense it often is, but that is because huge social and environmental costs are being excluded from the calculations.

All I'm saying is that there is a price to be paid at the sharp end.. environmentally and everywhere else.. for the food that is produced in a particular way.