【正文】 onment has deteriorated. The five wastewater discharged into the ocean ? First, the lowlevel radioactive waste water The socalled lowlevel radioactive waste water is a liter contained radioactivity less than 10 (5) Curie wastewater The second, containing the easily degradable anic pounds and heavy metals in wastewater Easily degradable anic matter, microanisms under natural conditions is difficult descending deposition of anic material occurs in the natural environment can be maintained indefinitely and disseminated, and thus a serious impact on the marine environment and ecological Third, medical sewage carrying pathogens, domestic sewage and industrial wastewater Pathogens, infectious agents, including pathogens, disease eggs, viruses. Pathogens can survive in the water c