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On World Food Day, Anna Hill asks how we may feed a rising world population and talks to Hannah Stoddart of Oxfam about the future of farming.

Anna discovers two very different attempts to grow more wheat in Africa - efforts to make GM wheat with nitrogen-fixing ability at the John Innes Centre in Norwich, and a new study that encourages farmers in Sub-Saharan Africa to grow certain conventionally-bred varieties and thus unlock the area's underused potential for wheat.

Presented by Anna Hill and produced in Birmingham by Rich Ward.