People waste nearly a pound of food daily: study

April 18, 2018, University of Vermont
People waste nearly a pound of food daily
US consumers waste nearly a pound of food per person each day, but the exact amount of food we trash differs by how healthy your diet is, a new national study finds Credit: Mark Hendry/UVM

Americans waste nearly a pound of food per person each day, but the exact amount of food we trash differs by how healthy your diet is, a new University of Vermont co-authored national study finds.

Between 2007-2014, U.S. consumers wasted nearly 150,000 tons of per day - nearly a pound (422 grams) of food per person each day. Researchers estimate that food waste corresponded with the use of 30 million acres of land annually (7 percent of total US cropland) and 4.2 trillion gallons of each year.

According to the study, published today in PLOS ONE, the amount of wasted food equals roughly 30 percent of the average daily calories consumed for every American, or more than 320 million people.

While most people want to eat better - by putting more fruit and vegetables on their plates - the study found that higher quality diets were associated with higher levels of food waste.

The study, by researchers at USDA's Agricultural Research Service, University of Vermont and University of New Hampshire, is the first to explore the links between diet quality, food waste and environment impacts.

Healthy diets and food waste

Of 22 food groups studied, fruits, vegetables and mixed fruit and vegetable dishes (39 percent of total) were wasted most—followed by dairy (17 percent), and meat and mixed meat dishes (14 percent).

"Higher quality diets have greater amounts of fruits and vegetables, which are being wasted in greater quantities than other food," says co-author Meredith Niles, a University of Vermont assistant professor. "Eating healthy is important, and brings many benefits, but as we pursue these diets, we must think much more consciously about food waste."

The study also found that healthier diets used less cropland than lower quality diets, but led to greater waste in irrigation water and pesticides, which are used at higher rates on average for growing fruits and vegetables."Most existing research has looked at greenhouse gas emissions or land use and its link with different diets," says Niles, a researcher at UVM's Gund Institute for Environment and Department of Nutrition and Food Sciences. "This study is the first to consider food waste as another important component of varying diet outcomes."

A national study of US consumers finds that fruit, vegetables and mixed fruit and vegetable dishes end up as food waste more than other types of food. The study suggests people need better strategies for reducing food waste, especially those pursuing healthy diets. Credit: Brian Jenkins/UVM

The researchers estimated that consumer food waste corresponded to harvests produced with the use of 780 million pounds of pesticide and 1.8 billion pounds of nitrogen fertilizer, annually. Both represent significant costs to the environment and the farmers who dedicate land and resources to producing food that's meant to be eaten.

Embrace 'imperfect' food

Researchers say education on preparing and storing fresh fruits and vegetables, and knowing the difference between abrasion and spoilage, is critical. Other policy efforts underway range from revising sell-by dates and labels for consistency, food planning and preparation education.

Niles highlights efforts to reduce food waste, including French grocer Intermarché's "inglorious fruits and vegetables" campaign, which promotes the cooking of "the disfigured eggplant," "the ugly carrot," and other healthy, but otherwise superficially damaged produce.

"Food waste is an issue that plays out at many different levels. Looking at them holistically will become increasingly important to finding sustainable ways of meeting the needs of a growing world population," says lead author Zach Conrad at the ARS Grand Forks Human Nutrition Research Center, Grand Forks, North Dakota.

Study background

To investigate the impact of quality on food waste and environmental sustainability, researchers collected data on food intake and from the 2015 Healthy Eating Index and USDA's What We Eat in America (WWEIA) database, and available food waste data.

The researchers calculated the amount of cropland used to produce wasted food using a biophysical simulation modelling. Using data from various U.S. government sources, the researchers estimated the amount of agricultural inputs, including irrigation water, pesticides and fertilizers, used to produce uneaten food.

While low may produce less food , they come with a range of negative impacts, researchers say. This includes low nutritional value and higher rates of cropland wasted.

The study notes that several countries, including Brazil, Germany, Sweden, and Qatar, have adopted dietary guidelines that incorporate environmental sustainability, but none include as a factor.

Explore further: Bananas are some of the worst food waste culprits

More information: Conrad Z, Niles MT, Neher DA, Roy ED, Tichenor NE, Jahns L (2018) Relationship between food waste, diet quality, and environmental sustainability. PLoS ONE 13(4): e0195405. doi.org/10.1371/journal.pone.0195405

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8 comments

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24volts
3 / 5 (2) Apr 18, 2018
I don't know what people they were working from but I don't waste food like that. I very seldom have to throw away any food of any type.
Thorium Boy
3 / 5 (1) Apr 19, 2018
Given American waistlines these days, I'm surprised anything is wasted. Maybe it's like the old Robin Hood cartoon where Friar Tuck grabs a piece of food, takes a bit, thows it away, grabs another bite of something throws it away, etc.?
tungsten
4 / 5 (1) Apr 19, 2018
The study is not about 'thrown away food', but is based on [an approximation of an approximation of aggregates of] government data about food waste along every stage of the production.
The only part about thrown away food says:
At the caonsumer level, LAFA provides data on the proportion of purchased food that is inedible (such as banana peels), but does not provide information on the proportion of edible food wasted at the plate level, so these data were derived using the computations described
..
(whatever 'caonsumer' may be)
24volts
not rated yet Apr 19, 2018
I still don't quite agree with them. The overwhelming majority of the food in this country that isn't 'pretty' enough to go on grocers shelves gets used for pre-packaged food for people or animal food where what it looks like when raw doesn't matter. It isn't just thrown out. I've worked on a couple of farms when I was young and food did not get thrown away. It was simply sold to companies that processed and cooked it. The stuff was then canned or bottled.

If they want to see food get wasted then they should go over to India and a few other countries like that that don't have enough refrigerated trucks to haul it somewhere before it goes bad. We don't waste anywhere near as much food as many countries do. I know, I've been around the world a bit and I've seen it with my own eyes.
mackita
1 / 5 (1) Apr 21, 2018
Food Waste Is Why Vegetarians Are Harder On The Planet Than Meat Eaters

For example, for production of rice it's required 2552 m³ of water/ ton rice, whereas for production of one ton of poultry 3809 m³ of water is required. Therefore the consumption of poultry may sound like the ineffective waste of water for someone - but the content of proteins in rice is ten times lower, than in the chicken meat! This explains, why people from deserts or harsh climate areas of Chad, Siberia or Mongolia are living from pasturage, instead of agriculture. Not to say, the plant proteins aren't fully compatible with these animals ones (they lack important aminoacids, which is why the herbivores preprocess them with bacteria) and many people are even allergic to them.

The environmentalism has not so simple and straightforward math, as some its proponents want to see it.
mackita
not rated yet Apr 21, 2018
TheGhostofOtto1923
not rated yet Apr 21, 2018
One way to decrease waste would be to increase the price enormously. This would solve more problems than might initially occur to you.
https://www.buzzf...VzPk0pLZ

"They are the most expensive fruits on earth. A melon once auctioned for $23,500."
Da Schneib
not rated yet Apr 21, 2018
I gotta go with @24volts on this one. I eat a lot of fruits and vegetables, and rarely if ever throw anything away because it went bad. If they're counting melon rinds and banana peels as "wasted food," sorry man, I don't eat melon rinds and banana peels and other compost. I think the methodology is problematic at best here.

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