I've always liked trees. And then, growing up, I took an interest in ecology, hedges being destroyed, the landscape being turned into prairies.

I don't think I'm really a rude person, but now I see myself on television, I think, 'Oh, God, that is a bit strong.' And I wonder if I've always been like that and I haven't been aware of it.

If you look at it ecologically, deforestation is high on the list of things which bring devastation. You cut down trees to build homes, for fuel, and you end up with no trees left, and you have to move on. If you take the earth as a whole, eventually there's nowhere to move on to.

I think political correctness is a moving line.

I meet so many that think population growth is a major problem in regard to climate change. But the number of children born per year in the world has stopped growing since 1990. The total number of children below 15 years of age in the world are now relatively stable around 2 billion.

Every time I have some moment on a seashore, or in the mountains, or sometimes in a quiet forest, I think this is why the environment has to be preserved.

I am travelling to different places and talking to people about travelling litter-free, observing the wildlife, and respecting the host.

The growing evidence of climate change is forcing attention on carbon emissions and their reduction.