uncompostable

Resists organic breakdown

Uncompostable describes materials that cannot break down through composting—the natural decomposition process that turns organic matter into soil.

Plastics, metals, and treated materials are uncompostable because they won't decompose in a compost pile: These takeout containers look eco-friendly but they're actually uncompostable.

The term often appears in waste-sorting contexts to distinguish what belongs in compost bins from what doesn't.

waste

landfill

Waste burial ground

hazardous · toxic · incineration · leachate · ash · contamination · disposal · diapers · packaging · cling-wrap

materials

plastic

Capable of being molded

polystyrene · polypropylene · nylon · polyester · acrylic · Teflon · vinyl · silicone · polyurethane · polycarbonate

pollution

microplastics

Sub-5mm synthetic environmental particles

chemicals · toxins · BPA · phthalates · additives · plasticizers · stabilizers · leaching · bioaccumulation · carcinogens

recycling

sorting

Arranging into sequence

glossy · laminated · recyclable · downcycling · inert · reprocessing · collection · curbside

Opposites
biodegradability

uncompostablecompostable

Able to decompose naturally

biodegradable · degradable · decomposable · organic · rotting

environmental impact of disposal

uncompostableeco-friendly

Not harming the environment

green · sustainable · recyclable

Family

compost, compostable, composted, composting, composts, composter, compose, composed, composer

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G