(A) Caused only by CO2, CFC, CH4 and NO2 gases
(B) Caused by CO2
(C) Caused by combination of different gases.
(D) None of the above
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(A) Caused only by CO2, CFC, CH4 and NO2 gases
(B) Caused by CO2
(C) Caused by combination of different gases.
(D) None of the above