Question
Question: The average concentration of CO<sub>2</sub> in the atmosphere is...
The average concentration of CO2 in the atmosphere is
A
10 ppm
B
100 ppm
C
300 ppm
D
1000 ppm
Answer
300 ppm
The average concentration of CO2 in the atmosphere is
10 ppm
100 ppm
300 ppm
1000 ppm
300 ppm