Observer: The world is throwing away a shocking amount of food. A report last week claimed that at least a third of the 4 billion tonnes of food the world produces each year never gets as far as our mouths. Between 30% and 50% of food purchased in Europe and the US is thrown away. The research is questioned, not least by the supermarkets, but it does echo the results of an exercise in Britain six years ago, when researchers for the government-funded Waste and Resources Action Programme (Wrap) went through...