Question

Greenhouse effect is mainly caused by :

• A. $N{O}_2$
• B. $CO$
• C. $NO$
• D. $C{O}_2$

Answer 1

The correct option is D $C{O}_2$

The man-made component of the greenhouse effect is caused by man’s activities that emit greenhouse gases into the atmosphere. The most important of these is the burning of fossil fuels. Fossil fuels contain carbon, and when they are burnt this carbon combines with oxygen in the atmosphere to form carbon dioxide.

So, the greenhouse effect is mainly caused by $C{O}_2$. Some other gases are also responsible for the greenhouse effect but carbon dioxide has a major contribution to it.

Hence, option $D$ is correct.