Question

What is the relative contribution of $CO_2$, $CH_4$, CFC and $N_{2}O$, to global warming?
A. 20%, 14%, 60%, 6%
B. 14%, 6%, 20%, 60%
C. 60%, 20%, 14%, 6%
D. 20%, 60%, 14%, 6%

Answer 1

Hint: Global warming is the increase in the earth's surface temperature due to the heat trapped by the greenhouse gases and other air pollutants released by the automobiles, industries, burning of fossil fuels and other human activities.

Complete Answer:
- Usually the sun's traditions which are reflected back from earth goes to space. But due to the presence of the particles of carbon dioxide, carbon monoxide and other greenhouse gases along with other air pollutants, the reflected solar radiations are trapped in the atmosphere.
- This leads to an increase in the temperature of the earth and this effect is known as the Greenhouse effect.
- Carbon dioxide, carmonoxide, methan, nitrous oxide chlorofluorocarbons are some of the greenhouse gases.
- The major supplement for global warming is from carbon dioxide ($CO_2$)- 60%, methane ($CH_4$)-20%, chlorofluorocarbons (CFC’s)- 14% and nitrous oxide ($N_{2}O$)- 6%.

Therefore the correct option is (C) 60%, 20%, 14%, 6%.

Note: Do not get confused between the Greenhouse effect and Global warming. Greenhouse effect deals with how the heat is retained by the greenhouse gases in the atmosphere. Whereas global warming is the increase in the average temperature of the earth.