A New Green Revolution?
The 'Green Revolution' of the 70s produced new 'miracle' rice and wheat which, it was hoped, would ensure that world hunger would disappear. But the new technology only seemed to make the rich farmers richer and the poor farmers poorer. Now agricultural scientists working in Mexico, Bangladesh and the Philippines are trying radical new approaches to help the poor grow more food. Narrator Paul Vaughan
Horizon editor GRAHAM MASSEY
Written and produced by MARTIN FREETH