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A major report published this week, claims a global agricultural revolution is needed to feed the growing population, which is set to reach 9 billion by 2050. One estimate suggests that while food production will need to increase by 70% over the next forty years it will also need to use fewer resources and produce less greenhouse gases.

The Foresight report calls on farmers to produce more from the land; for scientists to find new efficient techniques and for us all to reduce the amount of waste along the food chain. Charlotte Smith looks at some of the measures already being used on farm and in the lab and asks if it'll be enough.

Presented by Charlotte Smith and produced by Anne-Marie Bullock.