(a) What is meant by noise pollution? Mention some of the sources of noise pollution in your surroundings.
(b) Explain how noise pollution (or excessive loud noise) is harmful to human beings.
(c) State the various measures which can be taken to control (or reduce) noise pollution in our surroundings.
(d) What can be done along the roads to reduce noise pollution caused by traffic from reaching the residents of the area?
Name any four pollutants which cause water pollution. State any three ways of controlling water pollution.