It is vital that there is a narrator figure whom people believe. That's why I never do commercials. If I started saying that margarine was the same as motherhood, people would think I was a liar.

I'm no longer sceptical. I no longer have any doubt at all. I think climate change is the major challenge facing the world.

There are perfectly good independent small nations.

I'm swanning round the world looking at the most fabulously interesting things. Such good fortune.

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.

It is vital that there is a narrator figure whom people believe. That's why I never do commercials. If I started saying that margarine was the same as motherhood, people would think I was a liar.

Many individuals are doing what they can. But real success can only come if there is a change in our societies and in our economics and in our politics.