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Sue Broom asks if science can feed the world with pressure on land, water and energy increasing as the population grows.
Last on
Sun 21 Mar 201013:32GMT
BBC World Service Online
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- Wed 17 Mar 201010:32GMTBBC World Service Online
- Wed 17 Mar 201015:32GMTBBC World Service Online
- Wed 17 Mar 201020:32GMTBBC World Service Online
- Thu 18 Mar 201001:32GMTBBC World Service Online
- Sun 21 Mar 201013:32GMTBBC World Service Online
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