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Counting climate migrants

Is it true that environmental problems will create 200 million migrants? Some politicians and environmentalists warn that this is the case. But migration experts say that the...

Is it true that environmental problems will create 200 million migrants? Some politicians and environmentalists warn that this is the case. But migration experts say that the numbers are exaggerated. Tim Harford and Hannah Barnes investigate. This programme was first broadcast on the 蜜芽传媒 World Service.

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    Tim Harford explains the numbers and statistics in the news and in life.