E231: Insight from a national household food waste study

If people knew how much food they threw away each week, would they change their food-wasting ways? That's a question scientists explore in the 2023 State of Food Waste in America report. The research goal was to understand why and how households waste food, and what would motivate them to prevent food waste. In today's podcast, we'll talk with MITRE scientists Laura Leets and Grace Mika, members of a team who developed and launched the MITRE Food Waste Tracker app. This is a first of its kind app for households to log information about discarded food and learn ways to save money by reducing food waste. The Food Waste in America study team includes the Gallup Survey Company, researchers from the Ohio State University, the Harvard Law and Policy Clinic, ReFED, the Natural Resources Defense Council, and the World Wildlife Fund.

Interview Summary
 

Laura, let's begin with you. Can you give us a quick overview of why MITRE focused on measuring food waste at the household level and the behaviors?

Laura - In a general sense, Norbert, we know the United States waste 30 to 40% of our food, yet we do not know how much is wasted at the household level. We know that waste occurs along the entire farm to table supply chain, like approximately 15% with farms, 15% at manufacturing, about 20% at stores and restaurants and about 50% in the household. So, given that half the waste happens at the household level, it's important to measure it. If you can measure it, you can do something about it. Up to this point, people have not had an easy way to estimate their amount of food waste. So, to address this gap, not only did we develop a new way to measure household food waste and Grace will share more about that, but we also provided a baseline measurement of American household food waste.

I would like to really dig in a little bit more. How much food do American households waste, and do you have a sense of what kinds of foods people are wasting?

Laura - Let me start with the amount first. We found that the average American household wastes somewhere from 3 to 4.5 pounds per week. And there's two ways to measure household food waste. The first is you can focus on the edible or uneaten food. And with this measure, American households waste about on average three pounds per week. Second, you can add inedible food. So, that's your food scraps, your eggshells. And if you take edible plus inedible food together, then the American households wastes on average about 4.5 pounds per week. Let me give your listeners a couple analogies to understand that impact of that 3 to 4.5 pounds of household food waste. So, let's say we combine our own household food waste with everyone else's. The crop waste is large enough to cover the states of California and New York. From a personal perspective, imagine before every meal you scrape off 40% of the food on your plate. If you imagine that in each meal, you're going to start to understand that the current food waste is massive, and we're all contributing to it. So that's the measurement piece. I'm going to pass it over to Grace to discuss the types of food we're wasting.

Grace - Americans are wasting a wide variety of foods in their homes, but the number one wasted food type is your fresh produce. So, that would be your fruits and your vegetables.

I think this is really important to keep in mind, not only because, of course, fruits and vegetables are perishable, but when we think about healthy diets, many people in the nutrition space are encouraging fresh fruits and vegetables or fruits and vegetables in general. Ao this is a really important finding, and I'm excited to know this. But it's also important for our listeners to think a little bit more about this. Grace, I would like to learn a little bit more from you. Can you tell us more about the MITRE Food Waste Tracker, the app itself?

Grace - I would be happy to. The MITRE Food Waste Tracker app is meant to be a tool for households who want to understand exactly what's going uneaten in their home. If you had asked me what exactly I ate yesterday and how much of that went into my trash can, I would have a really difficult time remembering an answer to that question. And that's for just yesterday, let alone multiple days or weeks ago. Not knowing what exactly goes uneaten would make it really challenging for me to cut back on that waste. So, to solve that problem, our team designed an app which allows for food waste to be logged in real-time. So, right as you're doing your meal prep or you're clearing off the dinner dishes or emptying your leftovers out from the fridge. And the app tracks details both about the food itself, like where you got that from and the food group that it belongs to, as well as where, why, and how the food was thrown away.

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