Choose the correct statement about the greenhouse effect:
A. Caused by CO2, CFC, CH4 and NO2 gases
B. Caused by the combination of many gases
C. Caused by CO2
D. Caused by SO2 and O3
Answer:A
Choose the correct statement about the greenhouse effect:
A. Caused by CO2, CFC, CH4 and NO2 gases B. Caused by the combination of many gases C. Caused by CO2 D. Caused by SO2 and O3