"Compostable," "Biodegradable," "Eco-Friendly": Which Labels Actually Mean Anything?

There's a specific little hit of dopamine you get from tossing a "compostable" fork into the bin instead of a plastic one. Guilt-free, planet-saved, you're basically a wildflower meadow now.

We have to be honest with you — even though we sell compostable bags: a lot of that good feeling is being sold to you, and some of those labels mean almost nothing. So here's the straight talk on which green words are real, which are vibes, and how to not get greenwashed — including the awkward truth about our own category.

Let's start with the worst offender. "Biodegradable" sounds great and legally means… almost nothing on its own. Technically a banana and a battery are both "biodegradable" on a long enough timeline.

We have receipts. In a 2019 University of Plymouth study (published in Environmental Science & Technology), researchers buried "biodegradable," "oxo-biodegradable," compostable, and regular plastic bags in soil and sea for three years. The result? The biodegradable and conventional bags were still intact enough to carry a full 2.25 kg load of groceries after three years in the ground (Napper & Thompson, 2019). The lead researcher's own words: she was "really amazed that any of the bags could still hold a load of shopping."

The U.S. FTC agrees the word is slippery: you can't legally call something "biodegradable" unless it fully breaks down within about a year after normal disposal — and stuff in a landfill won't. So if a product just says "biodegradable" with no standard behind it, treat it as marketing.

Here's where it gets genuinely useful. "Compostable" is a regulated claim with actual testing behind it. The catch nobody puts on the front of the package: there are two very different kinds of compostable, and they are not interchangeable.

Translation: a plain "certified compostable" or standard BPI logo almost always means industrial compostable. Unless the package specifically says home-compostable, don't assume your garden bin will do the job.

Here's the part that quietly undoes everyone's good intentions: a compostable product thrown in the regular trash doesn't compost. In a landfill — packed tight, starved of oxygen — it just sits there like everything else (and can release methane as it slowly breaks down anaerobically). Same in your recycling: compostables aren't recyclable and can actually contaminate the recycling stream.

Compostable only "works" if it reaches the organics stream it was designed for. Right tool, right bin.

Rule of thumb: trust the certification logo and its standard, not the adjectives. "Eco-friendly" is a feeling; "BPI-certified to ASTM D6400" is a fact.

Our compostable trash bags are BPI-certified — which, per everything above, means they're built for commercial/industrial composting, not your backyard pile. We'd rather tell you that up front than let you toss one in the garden and wonder why it's still there in spring.

They genuinely shine if your city has curbside compost or a commercial organics program that accepts them (a lot of North American cities now do). So the honest move before buying any compostable product — ours included — is a 2-minute check: does my local program actually accept certified compostable bags? If yes, you've got a real, closed-loop win. If not, a sturdy reusable option might do more good.

Is "biodegradable" the same as "compostable"? No. "Biodegradable" is largely unregulated and can mean almost nothing on its own — a 2019 study found biodegradable bags still held groceries after three years in soil. "Compostable" is a tested, certified claim (e.g., ASTM D6400 / BPI), but usually for industrial facilities.

Can I put BPI-certified compostable bags in my backyard compost? Usually not. A standard BPI/ASTM D6400 mark certifies industrial composting (about 58 °C). Only trust a backyard pile if the package specifically says home-compostable (e.g., "OK compost HOME" or BPI's home certification, launched Dec 2025).

What happens to a compostable bag in a landfill? It doesn't compost. Sealed from oxygen, it breaks down very slowly (and can emit methane). Compostables need to reach an actual organics/compost stream to do their job.

How do I avoid greenwashing? Trust certification logos and their standards — BPI, ASTM D6400, EN 13432, "OK compost" — not vague words like "eco-friendly" or "plant-based." And check whether your local composting program accepts the item.