Earthworms play an important role in environmental ecology. Application of earthworms in environmental pollution has bright prospects. It primarily embodies in: as the indicators of soil and water environmental monitoring, earthworms are used to identify the damage by ecotoxicological research methods; using the collaborative symbiotic function of earthworms and microbe, a new type of combined biological treatment technology is set up to treat organic solid wastes and wastewater purification.

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