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From 2012.igem.org

The amounts of food thrown away each day are tremendous. Much of the food is thrown away in the production process, even though big part of it is good to eat; the bananas are too straight, the potatoes not round enough. We, as consumers, can do little about this, except maybe for electing politicians who would care for such issues. However, in the developed world, much food is thrown away by us, at our homes.
Living in big cities, we lost the relationship with our food that humans used to have for years, and we often buy half-processed food products to prepare them fast and eat in a hurry. We know a food product has gone bad once there's mold on it, but many of us just use the best-before dates as indicators of food freshness and edibility. The best-before dates are there for us informing us about the quality of our food, as it would seem, so nothing more simpler, right?
Wrong.