Reduce your food waste - for you and the planet!

brain health environment healthy eating healthy living real food resilience May 06, 2023

Over the past 2 weeks I’ve written about “Better health for you and the planet” and “Choose healthier foods with a lower environmental footprint.”  Click the links to read or read again!

Part 3 - Take steps to reduce your food waste and create a more environmentally sustainable diet

Now that you know which foods have a more healthful and sustainable impact on you and the environment, the second most important thing you can do is to reduce the amount of food wasted.  This has the added benefit of saving you money!

Food waste is food that is grown, raised, caught, or harvested, but never eaten.[21] Halving global food waste by 2020 is one item in the UNs Sustainable Development Goals (SDG Target 12.3)[22].When food goes uneaten, that means the land and water used to produce the food were wasted, along with all of the resources needed for its processing, packaging, and transportation.[18] It happens throughout the food supply system, from production to processing to packaging to transportation.[18] About one-third of the food produced on the planet is not consumed.[19] You may be surprised to learn that in many developed countries, up to half of this wasted food happens right in the home.[18,21] Food is the largest category of solid waste in Canadian and US residential waste, making up 22-28 percent of what we throw away.[23,24] This means that each of us can make a difference right in our kitchens.

When you throw food away in the garbage you’re wasting all of the water, land, and energy that went into producing, processing, and transporting that food. When the food ends up in landfills it can produce the gas methane, which is a greenhouse gas that is 25 times more powerful than the commonly known greenhouse gas, carbon dioxide.[18,21] Some people choose to compost their food waste, which isn’t as bad as the landfill because it turns the nutrients into a rich soil to nourish future crops. But, the best option is to reduce the amount of waste produced in the first place whenever possible.

Food waste happens at home for a few different reasons. 

  1. First of all, if you purchase impulsively without a plan, you might buy too much food that isn’t needed. 
  2. Secondly, food you don’t store properly can go bad before it’s eaten. 
  3. Thirdly, sometimes you prepare too much food, and leftovers stick around too long and go bad before they’re eaten.   Not to mention that leftover food can quickly lose its appeal as well as nutritional value.

Let’s look at some “pro tips” to address each of these areas.

Amount of food - Shopping wisely

When you purchase too much food in the first place, that can lead to waste. Here’s how to reduce your environmental impact when you purchase food:

  • Save time and money by starting your shopping with a meal plan or grocery list. This allows you to avoid impulse buying and buy what you need without forgetting anything (which also helps to cut down on the number of trips you need to make, saving you time, transportation costs, and fossil fuel burning).  Remember to check out my Thursday recipes to create your weekly meal plan.  Not a subscriber?  CLICK HERE!
  • Check your fridge and cupboards before grocery shopping so you don’t buy something you already have.
  • Before you head to the grocery store or market, have a meal or snack to avoid buying extra foods simply because you’re hungry.
  • Buy “imperfect” or “ugly” fruits and vegetables and other food that is approaching its “best before” or “sell by” date. Be sure to use the food fairly soon or freeze it.
  • Consider frozen foods when possible because at least one study showed that it can reduce the amount of fresh food waste by up to 47%[25].

Beyond wasting the food itself, there’s also waste from disposable grocery bags and food packaging. You can reuse your grocery bags, look for foods that have less packaging, or shop at stores where you can bring your own clean, refillable containers.

Sustainable restaurant meals

Grocery stores aren’t the only place you get food. Here are some tips for a more sustainable experience when eating out:

  • If ordering takeout food, ask them to exclude disposable utensils and packets.
  • If eating at a restaurant where the portion size is too big for one person, split a meal with a friend or bring a clean reusable container to bring extra food home with you.
  • Support your more sustainable restaurants or choose less-processed options wherever possible. 

Food storage - Keeping food fresh as long as possible

Fruits and vegetables are the most commonly wasted foods in our homes.[21]  Food lasts longest when you store it the right way:

  • Much of the fruit we purchase continues to ripen after harvesting, so be sure to refrigerate them once they’ve reached desired ripeness (e.g., apples, avocados, bananas, cantaloupe, kiwi, mangoes, nectarines, peaches, pears, plums, and tomatoes)[26].
  • Keep packaged food in its original packaging to extend freshness.
  • You can wash, chop, and dry unpackaged food you’re going to eat in the next few days and place it in clear containers in your fridge or freezer.
  • Don’t wash berries until you’re ready to enjoy them.
  • Put perishable food at the front of your fridge so you can see it easier and use it up first.
  • Reuse clean food storage containers and water bottles/travel mugs.
  • If something might go bad soon, put it in the freezer so you can eat it later.
  • When storing or freezing foods, put a date on the container to remind you when you stored or froze them.

How long will food stay fresh?

There are a lot of food dates that really seem like “expiry dates” and no one wants to get sick from eating spoiled food even if it doesn’t look or smell “off.” A recent study in the U.S. published in Waste Management found that food dates are often misunderstood and are strongly associated with more frequent discarding of foods[27]. Let’s have a quick refresher:

  • “Best Before” or “Use by” - Unopened food product, when stored properly will remain fresh, taste the way it’s meant to, have the nutrition as shown on the label, and retain any other qualities that are on the label[28].
  • “Packaged on” - The "packaged on" date along with the “durable life information” (which should be on the food label or a poster next to the food) tells you how long an unopened food product will retain its quality and freshness[28].
  • “Expiration date” - These are found mostly on infant formulas, meal replacements, and nutritional supplements. These dates mean that after the expiration date, the product may not have the same nutrient content that’s on the label. Foods and supplements past the expiration date should not be bought, sold, or consumed. They should be discarded.

There are other dates you may see, such as “sell by,” “prepared on,” “freeze by,” or “manufactured on.” These are voluntarily used by food manufacturers to be helpful for consumers, but have no specified definition[28].

When cooking or preparing food

  • Use the ripest or most perishable foods (particularly fresh greens or berries) first.
  • Try new recipes to use up food you already have.
  • When foods start to become overripe or bruised use them in a smoothie, soup, stir fry, casserole, or sauce, or freeze them right away.
  • Use vegetable scraps (e.g., carrot or celery tops, beet greens, broccoli stalks, herb stems, or meat bones) to make a broth (if you don’t have enough just yet, freeze what you have until you have enough).
  • When you make too much food, be sure to share it, store it, and/or enjoy it again before it goes bad. 

Remember, the goal isn’t to overeat to reduce waste but rather to try not to buy or make too much in the first place. 

When some of the food you have is still good but you can’t finish it, the best thing you can do is share your extras. Made too much? Bring a serving or two to a neighbour, friend, or family member, or even store it (consider freezing) to enjoy another day. Bought too much and it’s still in the unopened package? Donate it to a community refrigerator or food bank.

Disposing of food - When it’s bad, it just needs to go

Despite our best efforts at all of the above, some food will still inevitably go bad (hopefully, it's a lot less than before, though!). When food truly does pass the “expiry date” or go bad, it needs to be disposed of to save you from potential food poisoning. The best way to dispose of food waste is to compost your fruit and vegetable scraps in your garden or find out if your community or region has a composting program (that may take more than just fruit and veggie scraps).

Summary of reducing food waste

There are so many ways to reduce food waste to help the environment and your pocketbook, from how much you buy to keeping food fresh to knowing your “dates” to choosing which foods to eat first. Using even some of these tips will help you eat more sustainably.



18 - Health Canada. (2020, October 14). Healthy Eating and the Environment.

19 - International Panel on Climate Change.(2018). Special Report: Global warming of 1.5 ºC.

20 - Schwarcz, J. (2017, March 20). The Environmental Cost of Meat. McGill Office for Science and Society.

21 - Environment and Natural Resources Canada. (2019, June 28). Taking stock: Reducing food loss and waste in Canada.

22 - Food and Agricultural Organization of the United Nations. (2019). The state of food and agriculture.

23 - Environment and Climate Change Canada. (2020). National waste characterization report: The composition of Canadian municipal residual solid waste.

24 - Recycle Track Systems. (2021). Food Waste in America in 2021.

25 - Martindale W. (2017). The potential of food preservation to reduce food waste. The Proceedings of the Nutrition Society, 76(1), 28–33.

26 - Harvard T. H. Chan School of Public Health. (n.d.) Tackling food waste at home.

27 - Neff, R. A., Spiker, M., Rice, C., Schklair, A., Greenberg, S., & Leib, E. B. (2019). Misunderstood food date labels and reported food discards: A survey of U.S. consumer attitudes and behaviors. Waste management (New York, N.Y.), 86, 123–132.

28 - Canadian Food Inspection Agency. (2019, December 12). Date labelling on pre-packaged foods.


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