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).