UPSC 2025 › Environment & Ecology › Climate Change & Greenhouse Gases

3 questions · 2025 · answers as per the UPSC key

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Consider the following statements : I. Without the atmosphere, temperature would be well below freezing point everywhere on the Earth’s surface. II. Heat absorbed and trapped by the atmosphere maintains our planet’s average temperature. III. Atmosphere’s gases, like carbon dioxide, are particularly good at absorbing and trapping radiation.

Which of the statements given above are correct?

(a) I and III only
(b) I and II only
(c) I, II and III
(d) II and III only
Show answer
Answer: (c) I, II and III

Consider the following statements :

Statement I : Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.

Statement II : Silica-bearing clay is mixed with limestone while manufacturing cement.

Statement III : Limestone is converted into lime during clinker production for cement manufacturing.

Which one of the following is correct in respect of the above statements?

(a) Both Statement II and Statement III are correct and both of them explain Statement I
(b) Both Statement II and Statement III are correct but only one of them explains Statement I
(c) Only one of the Statements II and III is correct and that explains Statement I
(d) Neither Statement II nor Statement III is correct
Show answer
Answer: (b) Both Statement II and Statement III are correct but only one of them explains Statement I

Consider the following statements : I. Carbon dioxide (CO2) emissions in India are less than 0·5 t CO2/capita. II. In terms of CO2 emissions from fuel combustion, India ranks second in Asia-Pacific region. III. Electricity and heat producers are the largest sources of CO2 emissions in India.

Which of the statements given above is/are correct?

(a) I and III only
(b) II only
(c) II and III only
(d) I, II and III
Show answer
Answer: (c) II and III only