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You can't solve climate change with one idea, but what about 39? Tom Heap presents five more carbon-busting ideas from the Swiss Alps to the bottom of a South African coalmine. He's joined by the climate scientist, Tamsin Edwards to crunch the numbers and decide which will make a real difference to the future of our planet. Producer: Alasdair Cross Researcher: Sarah Goodman Produced in association with the Royal Geographical Society