In many countries one of the side effects of the second world war was to breed a generation that could not abide waste. Newspapers, jars and string were diligently saved and reused. Glass bottles were returned to their makers. Most importantly, though, food was never, ever thrown away. Leftovers were recycled into new meals, day after day. Fast forward to today and things have changed. There are reports of rich countries throwing out 25-30% of what is bought. Add in what never even makes it to the cupboard or the refrigerator, and the scale of the problem is considerably larger. Retna No seconds for me Reliable data, though, are scarce. Existing reports usually collate small-scale studies of households’ leftovers and rubbish bins and then extrapolate the results across a country. So Kevin Hall and his colleagues at the National Institute of Diabetes and Digestive and Kidney Diseases, in Bethesda, Maryland, decided to look at the problem in a new way. As they report in the Public Library of Science, they calculated the calorific consumption of America’s population based on data in the National Health and Nutrition Examination Survey carried out by the country’s Centres for Disease Control and […]