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Race to save fertile land as soil degradation threatens global food supply

About 52% of the earth's agricultural land is already in an infertile state, according to the Save Soil movement, citing data from the Intergovernmental Panel on Biodiversity and Ecosystem Services. If the current trend holds, 95% of the earth could be degraded by 2050. Martin Frick, director of the World Food Program's global office in Berlin, joins to discuss what's at stake.
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