Is compostable packaging worse for the environment if it's landfilled?

Short answer:

No—compostables are generally not worse than conventional plastic if landfilled, but landfill is not their intended or best end-of-life.

Here’s the nuanced reality:

Compostable packaging is designed to break down through biological processes into carbon dioxide, water, and biomass when it reaches a composting environment. That’s where it delivers its full environmental benefit.

If a compostable package instead ends up in a landfill:

• It does not behave like conventional plastic, which persists indefinitely and fragments into microplastics.
• It does not introduce long-lived synthetic polymers into soil or water systems.
• It typically remains biologically inert or degrades slowly, similar to other organic materials under low-oxygen landfill conditions.

In other words, it does not create additional long-term harm compared to plastic—but it also doesn’t deliver its intended upside.

The key distinction is opportunity cost, not added damage.

Plastic in a landfill creates a permanent environmental burden.

Compostable packaging in a landfill represents a missed opportunity to:

• Capture food waste
• Reduce methane from organics diversion
• Return nutrients to soil

That’s why compostables are best paired with:

• Composting access
• Clear labeling and education
• Policies like EPR that fund composting infrastructure

When those systems are in place, compostables reach their highest and best use: closing the organic loop rather than contributing to permanent waste.

Related to

• Sustainability

Updated on: 06/03/2026