The world according to David Attenborough

Sir David Attenborough answers questions from readers in today's Observer. He says he's against waste, he's an ardent recycler, he has low-energy lightbulbs, he wears a pullover rather than turning on the electric heater, and he's installing solar panels. His reply to one question sums up his philosophy.

Q: I work in a secondary school. What one thing would you most like us to impress upon young people's minds? Sylvia Greaves, learning mentor in a secondary school, Huddersfield

A: That we are part of the animal world. We are part of the natural world.

Watch Sir David Attenborough at this year's Ashden Awards.