Question

If there was no CO${}_2$ in the earth's atmosphere, the temperature of earth's surface would be

• A. As such
• B. Less than the present level
• C. Increase from present level
• D. Dependent upon oxygen amount of the environment

Answer 1

The correct option is B Less than the present level

Carbon dioxide is a greenhouse gas. It has the ability to trap sunlight and thus causes the increase in the temperature of Earth surface. If the situation on the Earth was with a lesser amount of $C{O}_2$, the temperature would have been very little. More pollution will cause the release of more $C{O}_2$ to the atmosphere causing global warming.