Water pollution has been increasing at a worrying rate. If consumed in a contaminated state, it may prove fatal to both – human beings and the environment. Let us find out how this pollution affects the ecological balance and poses a threat to our lives. First, it is agricultural pollution. Excess fertilizers, pesticides, and insecticides used for agricultural procedures often get discharged in water bodies right from streams to lakes and seas. Another way water pollution happens is mining activities. During mining, the rock strata is crushed with the help of heavy equipment on a large scale. These rocks are often composed of sulfides and heavy metals, which when combined with water from sulfuric acid and other harmful pollutants.

    Next, it happens through the so-called sewage water. The leftover or excess water that is left after carrying out domestic and industrial activities is called sewage water which consists of a lot of chemicals and is left untreated. People flushing medicines and other chemical substances down the toilet has been a cause of concern for the developed countries today. Also, the burning of fossil is another source.

52. The main idea of the text is . . . .