Question

Give suitable biological reasons for the following statement:

Water pollution is a major cause of concern in our country.

Answer 1

Water pollution is a major concern because polluted water can spread diseases such as cholera, typhoid and diarrhoea among people. Toxic substances and oil harm or kill aquatic plants and animals. Fertilisers can cause excessive algal growth, which lowers oxygen levels and threatens aquatic life. Pollutants may also enter food chains and build up in organisms.