Q. 34.6( 5 Votes )
The material generally used for sound proofing of rooms like a recording studio and auditorium is:
Styrofoam is generally used to sound proof rooms like a recording studio and auditorium. It is a special kind of polystyrene which reduces the noises from outside any immediate room or environment. Sounds are simply vibrations which are absorbed by the styrofoam and prevented from entering the recording studio making the studio soundproof.
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Looking at the deteriorating air quality because of air pollution in many cities of the country, the citizens are very much worried and concerned about their health. The doctors have declared health emergency in the cities where the air quality is very severely poor.
(a) Mention any two major causes of air pollution.
(b) Write any two harmful effects of air pollution to plants and humans.
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