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Glossary

What is human composting?

By Karl-Gustav Kallasmaa

Published July 2026

Human composting, formally called natural organic reduction, gently transforms a body into nutrient-rich soil over several weeks using organic material, warmth, and oxygen. Sometimes called terramation, it is an eco-friendly alternative to burial or cremation and is legal in a small but growing number of US states.

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The body is placed in a vessel with materials such as wood chips, straw, and alfalfa. Microbes break everything down over roughly one to two months, producing about a cubic yard of soil that families can use or donate to conservation land.

Washington became the first state to legalize the practice in 2020, and several others have followed. Availability is still limited, so families sometimes transport remains to a state where it is offered.

Common questions about Human composting

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This definition is general information, not legal or financial advice. Laws and prices vary by state and provider. See our editorial standards.