Question

Carbon dioxide is called green house gas because

• A. It emits light
• B. It traps infra red radiations
• C. It traps ultraviolet radiations
• D. It is involved in photosynthesis

Answer 1

The correct option is B It traps infra red radiations

The warming of earth's surface when sun radiations are absorbed and trapped in earth's atmosphere, is called greenhouse effect. The gases responsible for green house effect are called green house gases which trap the radiations and don't let them reflect back from the earth's surface. Carbon dioxide traps the infra red radiations and accounts for greatest contribution to greenhouse effect.

So, the correct answer is 'It traps infra red radiations'.