Ques. The true statement about ‘greenhouse effect’ is that it is
A. caused by combination of many gases
B. caused only by CO2
C. caused by CO2, CFC, CH4 and NO2 gases
D. none of these.
Answer:C
Ques. The true statement about ‘greenhouse effect’ is that it is
A. caused by combination of many gases B. caused only by CO2 C. caused by CO2, CFC, CH4 and NO2 gases D. none of these.