Attenborough to front climate-change film as BBC moves from teach to preach

Film forms part of Our Planet Matters, a season that launches on Sunday and will highlight environmental damage

Natural history programming is one of the oldest and most sustainable forms of TV life. It is 50 years since David Attenborough made his first major TV documentary series, The Miracle of Bali, its title capturing the eyes-wide wonder of the genre at the time.

But the climate of the BBC Natural History Unit, for which Attenborough has made most of his shows, has changed radically - because of climate change.