Q2 of 5 Page 18

How does air get polluted? 

Air gets polluted due to the following reasonsNatural sources   Volcanic eruptions Human activities
(1) Factories
(2) Automobiles
(3) Power plant
(4) Burning of firewood and dung cake

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1 Define a) Pollution b) Green house effect  c) Acid rain  d) Potable water 3 Describe the harmful affects of a) Air pollution  b) Acid rain  c) Ozone depletion 4 State the three character of drinking water 5 How can water be purified?