A study from the United Nations has found that about one third of all food produced for human consumption goes to waste.
It says consumers in rich, industrialised countries waste almost as much food - 222 million tonnes - as the net food production of sub-Saharan Africa.
Fruit and vegetables go to waste more than other types of food.
Researchers say that developing countries lose most of their food during production and distribution, and technology and infrastructure need to be improved.
They say most of the waste in industrialised countries is due to retailers and consumers throwing away edible food because of its appearance.