Analysing the European heatwave

The recent European heatwave broke records, but how severe was it really and what were the underlying causes? Having run the numbers, climate scientists say global warming played a large part, and makes heatwaves in general more likely.And we look at what seems an incredibly simple idea to counter the effects of global warming – plant more trees, but where and how many? (Photo: People cool themselves down in the fountain of the Trocadero esplanade in Paris. Credit: AFP/Getty Images)Presenter: Roland Pease Producer: Julian Siddle