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Sweet talk in biofuels dispute

As a war of words rages over biofuels and their impact on world food supplies, researchers in India are promoting sweet sorghum as a crop that combines the best of both worlds. The plants, which grow three metres high in dry conditions, yield grain that can be eaten by people or animals; their stalks provide sweet juice for bioethanol production and a crushed residue that can be burnt or fed to cattle.