Reducing Food Waste and Understanding the Food Waste Hierarchy

Food waste is a hidden crisis woven into everyday habits. From leftovers tossed in the trash to overstocked grocery shelves, waste occurs at every step of the food system. While it often goes unnoticed, its impact is far-reaching, affecting worldwide economies, ecosystems, and equity. Addressing food waste can help to build a future that values sustainability, responsibility, and smarter consumption.

Why Food Waste Matters

Globally, roughly a third of all food produced, approximately 1.3 billion tons, is never consumed. This loss affects every stage of the supply chain, from farms to retailers to homes. The consequences are vast. Food waste generates 8% to 10% of global greenhouse gas emissions, according to the World Resources Institute. And beyond emissions, it squanders freshwater, depletes soil nutrients, and accelerates climate change. Meanwhile, millions remain food insecure. This disconnect between abundance and need makes food waste both an environmental and ethical issue.

The Food Waste Hierarchy

To address the issue of food waste, the U.S. Environmental Protection Agency (EPA) developed the Food Recovery Hierarchy, a pyramid-like framework prioritizing prevention over disposal. Though it's commonly referenced in sustainability work, many individuals and businesses overlook the full scope of this list of priorities for eliminating food waste.

Source Reduction

Prevention is the most powerful tool. Consumers can avoid creating waste in the first place by planning meals carefully, monitoring expiration dates, and shopping wisely. And food producers and restaurants can use analytics and AI to predict demand more accurately.

Feed Hungry People

Edible surplus food should be redirected to those in need. Nonprofits and food rescue platforms help to create safe and efficient donation pipelines between businesses and food banks.

Feed Animals

Food unfit for humans may still be safe for animals. Many farms and zoos accept produce, bread, and grains to feed livestock and wildlife, reducing their feed costs and keeping this organic matter out of landfills.

Industrial Uses

Technologies like anaerobic digestion convert organic waste into bioenergy. Municipalities and large institutions can turn food scraps into renewable electricity or biogas, closing the loop in the food cycle.

Composting

Organic material that can't be reused or consumed should be composted. This not only diverts waste from landfills but also enriches soil and reduces the need for chemical fertilizers.

Landfill/Incineration

The last resort for food waste should be using landfills or incineration. These methods contribute significantly to methane emissions and resource loss and should not be used unless there's no other alternative.

Preventing Food Waste

While structural change is essential, individuals and households play a vital role in preventing waste. Up to 63% of food discarded at home could have been eaten, and that's a lot of money and nutrition being thrown away.

Plan Ahead

Organizing your weekly meals can prevent impulse buys and reduce forgotten items in the back of the fridge. Apps like Mealime and Paprika offer templates and grocery syncing for households.

Understand Food Labels

Confusion over "best before," "sell by," and "use by" dates often leads to unnecessary disposal. Learning what these labels really mean can tell you when food can still be eaten safely.

Use the Freezer

If you can't eat it in time, freeze it. Bread, berries, oily herbs, and soups freeze particularly well. Just be sure to label and date containers so you can easily tell what you have and what needs to be used first.

Get Creative With Leftovers

Transforming leftovers into new dishes can be both fun and sustainable. For instance, roasted vegetables can become wraps, curry, or pasta sauces, while overripe fruit is great for making smoothies or jam.

Store Smarter

Use clear containers so you can see what's inside; durable juice bottles can extend the shelf life of liquids, soups, and sauces, while rectangular glass containers are great for holding leftovers or batch-cooked meals. Store all perishables at the proper temperatures, and keep produce like bananas and onions separate from others to slow ripening.

Take Action: Tools and Resources

• UNEP Food Waste Index Report
• Too Good to Go
• Food Rescue University
• Food: Too Good to Waste
• Hotel Kitchen Food Waste Guide
• Canning Jars for Food Storage
• Understanding the Issue of Food Loss and Waste
• What to Do With Lonely Leftovers
• Easy Ways to Reduce Food Waste at Home
• Composting 101
• Compost Benefits