Environmental pollution results from ‘the release of substances and energy from waste products of human activities. There are many types of pollution. They are classified on the basis of the medium through which pollutants are transported and diffused. Pollution can be classified into (i) air pollution, (ii) water pollution, (iii) land pollution and (iv) noise pollution.

Which of the following is a major water-polluting industry?

All of the above

Major water-polluting industries are leather, pulp and paper, textiles and chemicals.