Biology
NULL
Medium
Question
Air contains __________ % of CO2 ?
A
0.02-0.03
B
0.03-0.04
✓ Official correct answer
C
0.04-0.05
D
0.05-0.06
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
0.02-0.03
No member explanations yet for this option.
B
0.03-0.04
No member explanations yet for this option.
C
0.04-0.05
No member explanations yet for this option.
D
0.05-0.06
No member explanations yet for this option.
Explanation
The concentration of carbon dioxide in the atmosphere is commonly cited as being in the range of about 0.03% to 0.04% (300-400 parts per million).