2. Environmental pollution: refers to the phenomenon that harmful substances or factors enter the environment and spread, migrate and transform in the environment, which adversely affects the survival and development of the environmental system. ?
3. Water pollution: also known as water pollution. After pollutants enter rivers, lakes, oceans, groundwater and other water bodies, the physical and chemical properties of water quality and water sediments or the composition of biological communities change, thus reducing the use value and function of water bodies.
4. Noise: From a physical point of view, noise refers to the sound with irregular and chaotic changes in sound intensity and frequency; From a biological point of view, any unpleasant and unwelcome sound can be regarded as noise. ?
5. Sustainable development: it not only meets the needs of contemporary people, but also does not harm the development of future generations' ability to meet needs. ?
6. Cleaner production: refers to the use and production methods and measures that can meet people's needs, rationally utilize natural resources and energy, and protect the environment. Its essence is to plan and manage human production activities with the least material and energy consumption, and to reduce, recycle and eliminate wastes in the production process. It includes three aspects: the use of clean energy, clean production process, little or no waste, and the production of clean products that are harmless to the environment.