Heavy metals from industrial processes can accumulate in nearby lakes and rivers. They are toxic to marine organisms such as fish and shellfish, and subsequently to those who eat them. Heavy metals can slow growth; birth defects and cancer.
Industrial waste often contains many toxic compounds that are harmful to the health of aquatic products. Some of the toxins in industrial waste can have only mild effects while others can be fatal. They can cause immunosuppression, fertility failure or acute poisoning.
Pollutants from wastewater often lead to diseases that infect aquatic and terrestrial organisms through drinking water. Microbiological contamination is a major problem in developing countries, with diseases such as cholera and typhoid fever being the main cause of infant mortality.

 Hi everyone. My name ...., I'm from ...........secondary school. I am going to talk today about water polluted.

    Water pollution is the contamination of bodies of water such as lakes, rivers, oceans, and groundwater.

     Water pollution can have many different cause.The main reason for water pollution is the daily activities of everyone.The next reason, disasters always happen contaminate the water. Besides, the operation of the plant also pollutes the water. because industrial waste water has not been treated, it pollutes the water. 

      Water pollution brings a lot of bad effects to people. Firstly, it seriously affects human health.

Secondly, it affects water sources and aquatic organisms because water is the habitat of fish, crabs, shrimp.

       To limit water pollution, we have the following measures:

The most important measure is to raise the sense of responsibility of the community.In addition, we must save water; treatment of waste before being discharged into the environment ..