Soil erosion threatens to leave earth hungry

Guardian: Within 40 years, there will be around 2 billion more people – another China plus India – on Earth. Food production will have to increase at least 40%, and most of that will have to be grown on the fertile soils that cover just 11% of the global land surface. There is little new land that can be brought into production, and existing land is being lost and degraded. Annually, says the UN's food and agricultural organisation, 75bn tonnes of soil, the equivalent of nearly 10m hectares of arable land,......

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