Question

If there was no carbon dioxide in the earth's atmosphere, the temperature of the earth would be

• A. Higher than the present
• B. Dependent on the amount of oxygen in the atmosphere
• C. Less than the present
• D. The same

Answer 1

The correct option is C Less than the present

Some gases prevent the escape of heat from the Earth. An increase in the percentage of such gases in the atmosphere would cause the average temperatures to increase world-wide and this is called the greenhouse effect. Carbon dioxide is one of the greenhouse gases. So, if there were no carbon dioxide, earth will lose all heat and the temperature would be less than the present.

The correct option is C.