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

I think we'd be very foolish to expect that we can just import everything from somewhere else and imagine that that's going to last for ever and ever and ever

While the demand for organic food outstrips supply, we happen to know that 77 percent of consumers don't want genetically engineered crops grown in this country. Consumers can choose whether or not to buy organic produce. Genetically modified ingredients will deny us choice in the long run.

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.

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 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 think we're going to find, with climate change and everything else, things like global warming and goodness knows what else and the cost of fuel for a start, that things are going to become very complicated.