Stephen Sackur speaks to swimmer Lewis Pugh. His death-defying swims are designed to focus attention on the impact of climate change. Is this a form of activism that works? Show more
Discover 11,128,835 listings and 280,032 playable programmes from the BBC
Stephen Sackur speaks to swimmer Lewis Pugh. His death-defying swims are designed to focus attention on the impact of climate change. Is this a form of activism that works? Show more