Question

Consider the following statements:
1. Global Warming is a phenomenon in which lower atmosphere traps more terrestrial radiation and thus the mean global temperature of the earth rises beyond $14°C$.
2. Global Warming takes place because of rise in the concentration of gases known as greenhouse gases namely-water, vapour, $C{O}_2,C{H}_4$, oxides of Nitrogen and man-made gases like $CFCs$.
3. Among the greenhouse gases, $C{O}_2$ is primarily responsible for Global Warming.
Which of the statements given above is/are correct?

• A. 1, 2 and 3
• B. 2 and 3
• C. Only 2
• D. Only 3

Answer 1

The correct option is A 1, 2 and 3

Global warming basically refers to warming of earth because of increased trapping of terrestrial radiation by the greenhouse gases present in the atmosphere due to their increased concentration. Due to burning of fossil fuels, concentration of greenhouse gases, especially carbon dioxide, has been increasing in the atmosphere.