"Two things seem incontrovertible about the mounting environmental catastrophe", writes Will Self.. "It's genuinely unprecedented - and we really are in it together".

Will wonders what we should say to our children about global warming and our role in it.

He says we have to hope that some sort of collective wisdom can emerge "because the alternative is frankly terrifying: a degraded, dystopic and nakedly Darwinian future".

Producer: Adele Armstrong