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Give advantages of CNG over pertol or di...

Give advantages of CNG over pertol or diesel .

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(i) CNG is better than petrol or diesel because it burns most efficiently and very little of it is less unburnt.
(ii) It is cheaper than petrol or diesel.
(iii) It cannot be siphoned off by thieves, and
(iv) It cannot ne adulterated like petrol or diesel.
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OSWAAL PUBLICATION-ENVIRONMENTAL ISSUES -TOPIC - 1 ( SHORT ANSWER TYPE QUESTIONS - I)
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  7. What is the major air pollutant ? Give its source.

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  8. What are radiocative elements ? Cite a few exmple .

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