Question

Greenhouse effect is mainly due to the increase in the levels of:
A. ${O_2}$
B. $CO$
C. $C{O_2}$
D. ${N_2}$

Answer 1

Greenhouse is a natural process due to which heat of earth’s surface increases when sun’s energy reaches the Earth’s atmosphere some of its reflected back to space and rest is absorbed and so radiated by greenhouse gases.

Complete step by step answer:
Some of the gases are responsible for the greenhouse effect on earth. If concentration of these gases increases the heat on earth’s surface increases because heat is absorbed by gases and radiated.
These gases are water vapor, carbon dioxide, methane, ozone, Nitrous oxide and chlorofluorocarbons.
Therefore, the correct answer of this question $C{O_2}$.

So, the correct answer is “Option C”.

Additional information:
Troposphere is the lowest layer of the atmosphere. Due to the greenhouse effect Earth’s surface and troposphere become warm.
Greenhouse gases help in holding Earth’s heat energy so that life is possible on earth.
As Earth’s surface is heated by sunlight, it radiates part of this energy back toward space as infrared radiation. This radiation tends to be absorbed by greenhouse gases in the atmosphere and rises in temperature.
If there is no greenhouse effect temperature of earth’s surface would be $- 18^\circ C$
On Venus, the concentration of carbon dioxide is very high. Therefore temperature of its surface is very high i.e. $45^\circ C(840^\circ F)$

Note:
Greenhouse effect is a useful process for life on earth’s surface. It maintains temperature on Earth for living. But if some gases like $C{O_2}$ $C{H_4}$ increase, the temperature of earth will also increase. That may cause harm in future.