Question

If there was no $C{O}_2$ in the atmosphere, the earth's temperature would be

• A. less than the present temperature
• B. same as the present temperature
• C. higher than the present temperature
• D. dependent on $O_2$ content of air.

Answer 1

The correct option is A less than the present temperature

If there was no $C{O}_2$ in the atmosphere, the earth's temperature would have seen less than the present temperature. $C{O}_2$ present in atmosphere traps the heat reflected back in space by acting as a green house glass panel. That is why it is termed as green house gas.