1.

Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ? (a) BHC (b) DDT (c) CFC (d) UNEP

Answer»

Which pollutant released into the air during refrigeration and airconditioning is the greatest contributor to the depletion of ozone layer ?

(a) BHC (b) DDT (c) CFC (d) UNEP



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