Question

Checking re-radiation of heat reflected by earth by CH${}_4$, CO${}_2$, O${}_3$ and chlorofluorocarbons is called as

• A. Green house effect
• B. Bohr's effect
• C. Pasteur's effect
• D. Cosmozoic effect

Answer 1

The correct option is A Green house effect

The burning of fuels in the atmosphere leads to the formation of poisonous oxides and dioxides which push up the temperature of the earth and contributes to global warming. Clouds and gases reflect about one-fourth of the incoming solar radiation, and absorb some of it but almost half of incoming solar radiation falls on earth's surface heating it, while a small proportion is reflected back. Earth's surface re-emits heat in the form of infrared radiation but part of this does not escape into space as atmospheric gases (e.g., carbon dioxide, methane, etc.) absorb a major fraction of it. The molecules of these gases radiate heat energy, and a major part of which again comes to earth's surface, thus heating it up once again.The above-mentioned gases (carbon dioxide and methane) are commonly known as greenhouse gases because they are responsible for the greenhouse effect.

So, the correct answer is option A.