Well, I'm having a good time. Which makes me feel guilty too. How very English.

All life is related. And it enables us to construct with confidence the complex tree that represents the history of life

All our environmental problems become easier to solve with fewer people and harder - and ultimately impossible to solve - with ever more people.

All we can hope for is that the thing is going to slowly and imperceptibly shift. All I can say is that 50 years ago there were no such thing as environmental policies.

I'm not over-fond of animals. I am merely astounded by them.

Do we really require so many gardening programmes, makeover programmes or celebrity chefs?

Before the BBC, I joined the Navy in order to travel.