Air pollution is caused by
(a) Organic and inorganic industrial effluents discharged into rivers.
(b) Presence of high proportion of sulphur dioxide, carbon monoxide and air-borne particulate materials.
(c) Unwanted sounds from industries, generators, saws and pneumatic and electric drills.
(d) Overdrawing of groundwater.
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Answer is b) presence of high proportional of Sulphur dioxide, carbon monoxide and air-borne particulate material
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Answer:
option (b)Presence of high proportion of sulphur dioxide, carbon monoxide and air-borne particulate materials.
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