(1) Specific damage: The main manifestations are: ① acute and subacute poisoning; (2) Chronic poisoning: chronic damage caused by long-term effects of environmental pollutants after entering the environment for several years; ③ Canceration: 90% of them are related to chemical factors, 5% to physical factors and 5% to biological factors (molds, viruses and parasites); ④ teratogenic effect; ⑤ Mutation ⑤ Sensitization.
(2) Nonspecific injury. The main manifestations are an increase in the incidence of common frequently-occurring diseases, a decrease in the body's resistance and a decrease in the ability to work.
(3) Diseases caused: ① infectious diseases, ② public hazards; ③ Occupational diseases; ④ Food poisoning.