自じ浄じょう作さ用よう

noun

self-purification; autopurificatory activity

Refers to the natural ability of an environment (e.g., a river, soil, or the atmosphere) to cleanse itself of pollutants or impurities. Often used in ecological or environmental contexts.

• 川かわの自じ浄じょう作さ用ようが働はたらいて、水すい質しつが改かい善ぜんされた。

  The river's self-purification ability kicked in, and the water quality improved.

• 環かん境きょう保ほ護ごの観かん点てんから、自じ浄じょう作さ用ようの限げん界かいを理り解かいすることが重じゅう要ようだ。

  From an environmental protection perspective, it is important to understand the limits of self-purification.