Question

Correct percentage of CO${}_2$ present in the atmosphere is

• A. 0.03%.
• B. 0.3%.
• C. 1%.
• D. 1.1%.

Answer 1

The correct option is A 0.03%.

Carbon dioxide ($C{O}_2$) constitutes about 0.03% (300 parts per million) of the atmospheric gases. Whereas, nitrogen comprises 70% and oxygen 21% of the atmospheric gases. Other gases, such as water vapors, nitric oxide, carbon monoxide and others, make up the 100%.