David Attenborough: environmentalism is a duty, not an interest – video interview

Sir David Attenborough tells George Monbiot that the British public is better informed about the environment than ever before, in part thanks to television. He discusses his new programme on the titanosaur - a subset of dinosaurs that can reach 37m in length. He also talks about Monbiot's proposal for 'rewilding', and says that despite nearing 90 he has no plans to retire

• Attenborough and the Giant Dinosaur is on BBC1 on Sunday at 6.30pm