The price of food worldwide has reached its highest-ever peak, higher than the 2008 set of figures that became associated with riots in several parts of the world.

BBC's Paulo Cabral provides a sense of what is happening in Brazil and James Copnall in Sudan.

Also on the programme, former chief economist of the World Bank, Joseph Stiglitz and Sheila Sisulu, deputy director of the World Food Programme, outline proposals to bring the price of food down.

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