The Circular Economy, Explained

Nature As Our Guide

Nature doesn’t produce waste. A leaf falls from a tree, lands on the forest floor, and gets broken down by fungi, bacteria, and insects into nutrients that feed the soil that feeds the roots that grow the next leaf. A salmon dies upstream and its body becomes nitrogen for the riverbank vegetation. An animal’s exhaled carbon dioxide becomes a plant’s building material. Circularity is embedded in nature’s design.

Every output is an input. Every ending is a beginning. There is no landfill in a forest. Nature has been running a circular system for 3.8 billion years. But somewhere along the way, humanity began producing and consuming beyond nature’s limits.

Late American economist and systems theorist, Kenneth Boulding, put it simply, “Anyone who believes in indefinite growth in anything physical, on a physically finite planet, is either mad or an economist.” Boulding was pointing to a simple truth: we cannot sustain infinite growth on a planet with finite natural resources.

There’s a concept called Earth Overshoot Day (an initiative of the Global Footprint Network). It’s the date each year when humanity has consumed more resources than the planet can regenerate in that entire year. Everything after that date is deficit spending against the earth’s balance sheet. In 2025, that date was July 24th. We burned through a full year’s worth of ecological capacity in less than seven months. If you break it down by country, the picture is even starker: the United States hit its overshoot day on March 14th, meaning if the whole world consumed like Americans, we’d need roughly five earths to sustain it.

Over the last 50-some-odd years, we’ve been increasingly moving in the wrong direction. In 1971, Earth Overshoot Day fell on December 25th. This year, it’s projected to fall on June 5th. The reason the date keeps moving earlier is the linear economy. We extract faster, waste more, and return little.

The Linear Economy: Take, Make, Waste

The dominant global economic model works like this: extract raw materials from the earth, manufacture them into products, sell those products, and then throw them away. The Ellen MacArthur Foundation calls this the “take-make-waste” model, and it describes most everything we produce and consume.

Your morning coffee cup. The shirt you’re wearing. The food you didn’t finish last night. The phone in your pocket. All of it was made from extracted materials, and almost all of it is destined to end up in a landfill, an incinerator, or an ocean.

This isn’t an accident. It’s the architecture of the system. The majority of products aren’t designed to be repaired, reused, or returned to the earth. They’re designed to be replaced. And the entire economy is structured to reward extraction and consumption, not stewardship.

According to the Circularity Gap Report, published by Circle Economy Foundation in collaboration with Deloitte, the global economy is only 6.9% circular. That means over 93% of the materials we extract and use and never cycled back into the economy. They just become waste.

What a Circular Economy Actually Looks Like

A circular economy flips the model. Instead of extract → produce → discard, it designs systems where materials stay in use, waste is eliminated (recycled or composted) by design, and natural systems are regenerated rather than depleted.

The Ellen MacArthur Foundation, which has done more to formalize this framework than anyone, breaks it into three principles: eliminate waste and pollution, circulate products and materials at their highest value, and regenerate nature.

That sounds abstract until you see it in practice. Here's what it looks like at different scales:

In manufacturing: Products are designed to be disassembled, repaired, and remanufactured instead of thrown away when one component fails. Patagonia repairs jackets instead of replacing them. Fairphone builds modular smartphones you can fix yourself.

In agriculture: Crop waste and food scraps return to the soil as compost, rebuilding the organic matter that grows the next season's food. The nutrients cycle. Nothing leaves the system.

In materials: Aluminum gets recycled indefinitely without degrading. Glass does the same. These materials are already circular. We just don't treat them that way at scale.

In biology: This is where it gets interesting. Nature doesn't produce waste. Every output of one system is an input for another. A fallen leaf becomes soil becomes a root system becomes a tree becomes a fallen leaf. The circular economy is an attempt to make human systems work the same way.

Outdated Systems Designed To Waste

If circularity is possible, why is 93% of the global economy still linear? Because entire industries are built on the assumption that waste is someone else's problem.

Fast fashion is the most grotesque example. The global fashion industry produces 92 million tons of textile waste per year. In the U.S. alone, 11.3 million tons of textiles end up in landfills annually (85% of everything we discard). A garbage truck's worth of clothing is burned or buried every single second.

Industrial agriculture runs the same linear playbook. We extract nutrients from soil to grow food, ship that food hundreds or thousands of miles, and then bury the uneaten portion in landfills where it produces methane. Meanwhile, the depleted soil gets pumped with synthetic fertilizers made from fossil fuels. We're spending energy to replace nutrients we already had, but threw away.

Single-use plastics are perhaps the most visible failure. Plastic is an extraordinary material. It is durable, lightweight, and endlessly versatile. And we use it once and throw it in a hole. Less than 10% of plastic ever produced has been recycled. The rest is in landfills, in the ocean, or in our bloodstreams as microplastics.

These aren't separate problems. They're one problem appearing across various facets of a linear system that mistakenly treats the earth as both an infinite source of raw materials and an infinite sink for waste.

Building The Habit of Composting

I’ll step out of the educational frame for a moment, because this one gets to me.

I spend my days talking to people about diverting organic waste from the landfill. And the thing I run into constantly is the gap between what people say they value and what they actually do.

The biggest barrier to circularity isn’t access or cost: it’s habit. Most people I talk to already care on some level. Most recycle, shop local, and think about their ecological footprint. But compostable waste is the blind spot. It just doesn’t feel like a problem until you start paying attention to it.

And that’s something that has been a personal journey for me. Once upon a time, I didn’t think much about waste. I professed to care about the environment, nature, and healthy communities, yet my consumption habits and waste were something I resisted thinking about. As far as I was concerned, once I threw something away, it was out of sight, out of mind.

Why? Honestly, it was one more thing to think about and act on. And nothing and no one was forcing, or rewarding me, to do so.

If it’s not obvious, that was a younger version of myself — a version of me that wasn’t neck deep in waste everyday. I was more concerned about what the world could do for me, rather than what I could do for the world.

Then I realized something: sustainable habits are themselves the reward. Recycling, reducing, reusing, repairing, and composting keep me connected to what I own, what I use, and what I consume. And they give me a sense that I’m participating in something bigger than myself, something that genuinely matters and makes a difference.

What Circularity Requires

The circular economy cannot solely be built by individual consumers making sustainable choices, though that helps. It requires three things:

Systems, not gestures. Reusable shopping bags are great. A municipal composting facility that processes 100% of a city's organic waste is a system. The difference is scale and permanence. Gestures make us feel better and genuinely help move us in the right direction. But systems actually change the math at scale.

True cost accounting. Right now, the price of a product doesn't reflect the cost of disposing it, the environmental damage of extracting its raw materials, or the lost value of the nutrients or materials it contains. When landfill disposal is free (or feels free), there's no economic incentive to design for circularity.

Participation at scale. A circular system only works when enough people and businesses use it. Composting infrastructure with ~3% adoption is awesome, but it’s too low to qualify Missoula as a truly circular economy. It is happening in pockets, but the path to widespread adoption is going to require participation from a meaningful portion of the remaining 97%. Research from the Annenberg School for Communication suggests that when 25% of a population adopts a new social norm, it creates a tipping point for large-scale social change.

Missoula: ClosIng In On The Closed Loop

Missoula is genuinely further along in circularity than most American cities. We have a city-owned composting facility that processes food waste and yard debris into finished soil. We have curbside compost (and recycling) services. We have Home ReSource salvaging building materials from the waste stream. We have a community that at least talks about these things. Zero by Fifty isn't just a slogan, it's a city commitment to reduce landfill waste by 90% by 2050.

The food-soil loop in Missoula is one of the clearest examples of circular economics you'll find anywhere at the local level. The loop physically closes within city limits. While the infrastructure exists, adoption is still a fraction of what it could be.

Missoula talks a big game about sustainability, and I say that as someone who loves this town and believes in what it's building. But there's a real tension between the identity we share (outdoor culture and love for nature) and the investment we actually make in circular systems. We're ahead of most places, but we're still far behind where we could be.

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Missoula Compost Collection is a locally owned, family-operated company partnering with Garden City Compost and the City of Missoula to keep organic waste out of the landfill and return it to the soil. If you're curious about how curbside composting works in Missoula or want to see the full list of what's accepted in the compost stream, we've written guides for both. Ready to join the movement? Start residential pickup at $19.21/month, explore commercial pickup for your business, or set up event composting for your next gathering.