As you open the pantry door, you discover that some of the food you purchased yesterday has already gone off or perished – despite the expiry date being weeks away. Feelings of guilt and anger start to wash over you, and rightly so. Food wastage not only affects you economically, but has a widespread ethical and environmental impact. Notwithstanding your own personal loss, there's around 88 million tonnes of food waste in Europe each year, which has associated costs estimated at €143 billion. Put simply by Bernhard Url, executive director of the European Food Safety Authority: "Europe wastes 30% of food, it is an ethical scandal."