1.

Why naturally occurring greenhouse effect is important? (a) It maintains the temperature of earth at average 15 °C. (b) It maintains the temperature of earth at 18 °C. (c) It maintains lot of greenery on the surface of the earth. (d) It maintains level of ozone in atmosphere.

Answer»

Correct option is (a) It maintains the temperature of earth at average 15 °C.



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