Fill in the blanks with the help of words given in bracket after each sentence.

Fill in the blanks with the help of words given in bracket after each sentence.

(a) When air is contaminated by ________ substances which have a ________ effect on both the ________ and ________, it is referred to as ________. (air pollution, harmful, living, unwanted, non-living, pollutants).

(b) Many ________ are responsible for causing ________ pollution. Petroleum ________ are a major source of ________ pollutants like ________ and ________. (sulphur dioxide, refineries, industries, nitrogen dioxide, gaseous, liquid, people, air).

(c) While ________ your teeth, leaving the ________ running may waste several ________ of water. (tap, litres, brushing, washing, drops)

(d) Water which is suitable for _________ is called ________ water. (washing, bathing, drinking, potable, soft).

(e) Water which looks clean still has disease carrying ________ and ________ impurities.(insects, microorganism, particles, dissolved, harmful).