Environmental restoration: Take physical, chemical and biotechnology measures to the polluted environment to reduce the concentration or toxicity of pollutants in the environment or make them completely harmless.
Definition of ecosystem: refers to the whole composed of biological communities and their environment in a certain time and space. Each component is interrelated and restricted by species flow, energy flow, characteristic cycle, information transmission and value flow, forming a complex with automatic adjustment function.
Definition of ecosystem health: process mechanism (pathology) of ecosystem degradation (dysfunction), evaluation, diagnosis and early warning methods of ecosystem health; Sustainable health management method and regulation technology of ecosystem.