Question

Arrange the following incidents in sequential order in the context of man-
made global warming:
(A) The atmospheric concentrations of carbon dioxide and CH4 have increased
(B) Burning of fossil fuels and deforestation
(C) Gradual increase in the average temperature of the earth’s lower atmosphere
(D) Melting of polar ice with a resulting rise in sea level and coastal flooding
Choose the correct answer from the options given below:

• A. (C), (B), (A), (D)
• B. (A), (C), (B), (D)
• C. (B), (A), (C), (D)
• D. (C), (B), (D), (A)

Answer 1

The Correct Option is C

The correct sequence of incidents in the context of man-made global warming is as follows: 

1. Burning of fossil fuels and deforestation (B): Human activities such as the burning of fossil fuels for energy and deforestation for agriculture or urban development release large amounts of greenhouse gases, including carbon dioxide (CO2) and methane (CH4), into the atmosphere.
2. Increase in atmospheric concentrations of carbon dioxide and CH4 (A): As a result of these activities, the levels of CO2 and CH4 in the atmosphere rise, enhancing the greenhouse effect, which traps more heat in the Earth's atmosphere.
3. Gradual increase in the average temperature of the earth’s lower atmosphere (C): The enhanced greenhouse effect leads to a gradual warming of the Earth's lower atmosphere, contributing to what is commonly known as global warming.
4. Melting of polar ice with a resulting rise in sea level and coastal flooding (D): The warming temperatures cause polar ice to melt, leading to higher sea levels. This results in coastal flooding and other related impacts on ecosystems and human settlements.

Thus, the correct order is (B), (A), (C), (D).

Answer 2

The correct sequence of events leading to the melting of polar ice is as follows:

• (B) Burning of fossil fuels - The process of burning fossil fuels such as coal, oil, and natural gas releases large amounts of carbon dioxide (CO2) and other greenhouse gases into the atmosphere.
• (A) Greenhouse gases increase - These greenhouse gases trap heat in the Earth's atmosphere, leading to an enhanced greenhouse effect. As a result, the concentration of greenhouse gases in the atmosphere rises significantly.
• (C) Temperature rise - The increased concentration of greenhouse gases causes the Earth's average temperature to rise, a phenomenon known as global warming.
• (D) Polar ice melting - The rise in global temperatures leads to the melting of polar ice caps and glaciers, contributing to sea level rise and other environmental impacts.

This sequence highlights the chain of events starting from human activities, leading to climate change and its consequences on polar ice.