300 years ago, Abraham Darby used coal instead of wood to make iron. We go to where it happened. And Dieter Helm on the cost of reversing the coal economy to limit global warming. Show more
Discover 11,128,835 listings and 280,377 playable programmes from the BBC
300 years ago, Abraham Darby used coal instead of wood to make iron. We go to where it happened. And Dieter Helm on the cost of reversing the coal economy to limit global warming. Show more