As stars of entertainment prepare to lobby on climate change at the Copenhagen summit next week, Jeremy Paxman talks to veteran environmental campaigner Sting about the effect of celebrity on campaigns, accusations of green hypocrisy by globe trotting stars and his efforts to prevent the building of a hydro-electric dam in Brazil.

Indigenous tribes in the Amazon say the Belo Monte project, which would be the third largest hydro-electric dam in the world, poses a threat to their way of life.

Broadcast on Tuesday 1 December 2009