NEET BIOLOGY

Detailed explanation-1: -Diseases, Medical Problems Water pollutants may cause disease or act as poisons. Bacteria and parasites in poorly treated sewage may enter drinking water supplies and cause digestive problems such as cholera and diarrhea.

Detailed explanation-2: -spills or leaks from oil and chemical containers. trade effluent going into surface water drains instead of foul water drains, or straight into watercourses. removing too much water from surface waters and groundwater. run-off containing fertilisers and pesticides from farming into surface waters.

Detailed explanation-3: -Waterborne pathogens, in the form of disease-causing bacteria and viruses from human and animal waste, are a major cause of illness from contaminated drinking water. Diseases spread by unsafe water include cholera, giardia, and typhoid.