I would be absolutely astounded if population growth and industrialisation and all the stuff we are pumping into the atmosphere hadn't changed the climatic balance. Of course it has. There is no valid argument for denial.

You know, it is a terrible thing to appear on television, because people think that you actually know what you're talking about.

We can now destroy or we can cherish-the choice is ours.

There is no question that climate change is happening; the only arguable point is what part humans are playing in it.

I am an ardent recycler. I would like to think that it works. I don't know whether it does or not.

The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.

Nothing in the natural world makes sense - except when seen in the light of evolution