This week's episode of The Food Programme from BBC radio 4 looked at food waste and the efforts being made to reduce it by one New York chef: Dan Barber. Dan's approach is to look at the question of sustainability across the entire farming and food production industry.
It's a perspective that began when he found himself standing in a field in New York State, surrounded by dozens of food crops that the farmer had no market for.
You can catch the podcast here: http://www.bbc.co.uk/programmes/b08k1h2h