The UN says there could be an extra three billion people in the world by the end of the century, presenting immense challenges to the world's resources.

However, research shows that the world could feed nearly all of those people without increasing food production since more food is thrown away every year than would be required by the increased population.

As part of Al Jazeera's Wasteful World series, Rory Challands looks at the extent of the wastage.

Source: Al Jazeera