Question

Which one of the following is a greenhouse gas?
A) Oxygen
B) Methane
C) Sulphur dioxide
D) Nitrogen

Answer 1

Hint:- A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range and causes the greenhouse effect. Without greenhouse gases, the average temperature of Earth's surface would be about instead of the present temperature. In short, greenhouse gases help for the survival of living beings on Earth by maintaining a temperature that is sustainable to living organisms.

Complete Answer:- The vast majority of greenhouse emissions come from the combustion of fossil fuels (coal, petroleum (including oil) while factors like deforestation and other environmental changes also contribute to it. The leading source of anthropogenic methane emissions is agriculture, gas venting and fugitive emissions from industries. Traditional rice cultivation is the second biggest agricultural greenhouse emission source which follows energy consumption, the first in the list.
The primary greenhouse gases in Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone and are responsible for causing a greenhouse effect. They absorb and emit infrared radiation. A greenhouse gas is a gas which produces heat in the atmosphere as it increases in amount and gets stuck in the environment and cannot then leave the internal layers of Earth’s atmosphere. These gases introduce air pollution as they contaminate natural resources and the environment.
Among the options given the only example of greenhouse gas is methane.

Hence, the correct option is (B).

Note:- The atmospheres of other planets like Venus, Mars, and Titan also contain greenhouse gases. Since the beginning of the Industrial Revolution has produced a significant increase in the atmospheric concentration of greenhouse gases despite the uptake of more than half of the emissions by various natural sinks. The aerosol is a suspension of fine solid or liquid particles suspended in air or another gas. Examples include dust, smoke, and fog.