Climate Change: UPSC Previous Year Questions (Environment and Ecology)
1 previous year UPSC Prelims question on Climate Change (Environment and Ecology). Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
Showing 1–1 of 1 question
UPSC 2017Environment and Ecology · Climate Change
Q1. In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be potential sites for carbon sequestration? 1. Abandoned and uneconomic coal seams 2. Depleted oil and gas reservoirs 3. Subterranean deep saline formations Select the correct answer using the code given below:
Explanation
Carbon Sequestration is a process to capture and store CO₂ to curb global warming. It is captured from the air, industries or power stations and stored permanently underground. Terrestrial Carbon Sequestration is the process through which CO₂ from the atmosphere is absorbed by trees and plants through photosynthesis and stored as carbon in soils and biomass (tree trunks, branches, foliage, and roots). In Geologic Carbon Sequestration CO₂ can be stored in oil reservoirs, gas reservoirs, unmineable coal seams, saline formations and shale formations with high organic content.
Statement 1 is correct: Uneconomic coal seams can be used to store CO₂ because the CO₂ molecules attach to the surface of coal.
Statement 2 is correct: CO₂ is sometimes injected into declining oil fields to increase oil recovery.
Statement 3 is correct: Other potential sites are gas reservoirs, saline formations and shale formations with high organic content.
Answer key for these questions
Q
UPSC year
Correct answer
1
2017
(d) 1, 2 and 3
Frequently asked questions
How many previous year UPSC questions are there on Climate Change?
This page covers 1 previous year UPSC Prelims GS Paper-I questions on Climate Change (Environment and Ecology), asked from 2008 to 2025. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Climate Change?
Questions on Climate Change (Environment and Ecology) are available for 14 years, from 2008 to 2025. Use the Year filter to practise a single paper.
