British scientists say the future of global food security could lie in genetically modified crops.
They have been given more than six million pounds by the Bill Gates Foundation to develop self-fertilizing cereals, which they say will be of vital benefit to farmers in sub-Saharan Africa.
Fertilisers are expensive and damaging to the environment, and the GM grains could 'reform' agriculture. But the technology may take ten years to develop, and some say, poor farmers can't wait that long. The BBC's Tom Heap reports.
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