Our atmosphere consists of__________ CO2?
A. 0.03 to 0.04% CO2
B. 0.3 to 0.4% CO2
C. 3 to 4% CO2
D. None of these
A. 0.03 to 0.04% CO2
B. 0.3 to 0.4% CO2
C. 3 to 4% CO2
D. None of these