U.S. residents are wasting food like never before.
While many Americans feast on turkey and all the fixings today, a new study finds food waste per person has shot up 50 percent since 1974. Some 1,400 calories worth of food is discarded per person each day, which adds up to 150 trillion calories a year.
The study finds that about 40 percent of all the food produced in the United States is tossed out.
Meanwhile, while some have plenty of food to spare, a recent report by the Department of Agriculture finds the number of U.S. homes lacking “food security,” meaning their eating habits were disrupted for lack of money, rose from 4.7 million in 2007 to 6.7 million last year.
About 1 billion people worldwide don’t have enough to eat, according to the World Food Program.
The new estimate of food waste, published in the journal PLoS ONE, is a relatively straightforward calculation: It’s the difference between the U.S. food supply and what’s actually eaten, which was estimated by using a model of human metabolism and known body weights.
The result, from Kevin Hall and colleagues at the National Institute of Diabetes and Digestive and Kidney Diseases, is about 25 percent higher than similar estimates made in recent years.
Last year, an international group estimated that up to 30 percent of food — worth about $48.3 billion — is wasted each year in the United States. That report concluded that despite food shortages in many countries, plenty of food is available to feed the world, it just doesn’t get where it needs to go.
Previous calculations were typically based on interviews with people and inspections of garbage, which Hall’s team figures underestimates the waste.
ScienceNOW, an online publication of the American Association for the Advancement of Science, reports that food waste occurs at the manufacturing level and in distribution, but more than half is wasted by consumers, according to a separate study earlier this year by Jeffery Sobal, a sociologist at Cornell University.
Meanwhile, Hall and colleagues say a related and growing problem, obesity , may be fueled by the increased availability of food in this country and the incessant marketing of it. All that extra food is bad for the environment, too.
Addressing the oversupply of food in the United States “could help curb to the obesity epidemic as well as reduce food waste, which would have profound consequences for the environment and natural resources,” the scientists write. “For example, food waste is now estimated to account for more than one quarter of the total freshwater consumption and more than 300 million barrels of oil per year representing about 4 percent of the total U.S. oil consumption.”
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