Even if there is plenty of food we might not be able to afford it.
Prime Minister Gordon Brown wants to set up a £60bn annual fund to help poor countries deal with climate change.
He hopes it will break the deadlock over who will pay developing nations to adapt to the changing climate and who will help them obtain clean technology.
Countries must reach a binding global agreement on carbon emission cuts at December's Copenhagen summit, he said.
Developing nations don't need hand outs. Just bring down the barriers to trade and let our cost of living fall while their income rises.