How to understand that traditional environmental protection is terminal treatment or pollution first and then treatment?

Terminal treatment refers to the development and implementation of effective pollutant treatment technology at the end of the production process. Terminal treatment is an important stage of environmental management development, which is conducive to eliminating pollution incidents and slowing down the trend of environmental pollution and destruction caused by production activities to a certain extent. However, with the passage of time and the acceleration of industrialization, the limitations of terminal treatment are increasingly exposed. First, the pollution control facilities have large investment and high operating costs, which makes the production cost of enterprises rise and the economic benefits decline; Secondly, terminal treatment is often not thorough treatment, but the transfer of pollutants, such as flue gas dehydration, dust removal to form a large number of waste residue, centralized treatment of wastewater to produce a large number of sludge and so on. , so pollution cannot be eradicated; Third, terminal processing does not involve the effective use of resources and cannot stop the waste of natural resources. Therefore, to truly solve the pollution problem, we must implement process control, reduce the generation of pollution, and fundamentally solve environmental problems.