• # question_answer The greenhouse effect is because of the A) Presence of gases, which in general are strong infrared absorbers, in the atmosphere. B) Presence of $C{{O}_{2}}$ only in the atmosphere. C) Pressure of ${{O}_{3}}\,and\,C{{H}_{4}}$ in the atmosphere. D) ${{N}_{2}}O$ and chlorofluorohydrocarbons in the atmosphere.

Green-house gases such as $C{{O}_{2}}$, ozone, methane, chlorofluorocarbon compounds and water vapour form a thick cover around the earth which prevents the IR rays emitted by the earth to escape. It gradually leads to increase in temperature of atmosphere.