UPSC Prelims PYQ

UPSC Prelims Environment Questions

110 Environment questions from previous UPSC Prelims papers, from the latest year backwards, each with its answer and explanation.

Questions
110
Years covered
2016–2026
Exam years
7
With answers
110

Environment questions by year

UPSC Prelims Environment Questions

1–20 of 27
  1. Q1 2025 Prelims GS

    Consider the following statements: Statement I: Circular economy reduces the emissions of greenhouse gases. Statement II: Circular economy reduces the use of raw materials as inputs. Statement III: Circular economy reduces wastage in the production process. Which one of the following is correct in respect of the above statements?

    1. Both Statement II and Statement III are correct and both of them explain Statement I
    2. Both Statement II and Statement III are correct but only one of them explains Statement I
    3. Only one of the Statements II and III is correct and that explains Statement I
    4. Neither Statement II nor Statement III is correct
    Circular economyEnvironmentSustainability
    View answer & explanation
  2. Q2 2025 Prelims GS

    Consider the following statements: Statement I: Studies indicate that carbon dioxide emissions from the 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?

    1. Both Statement II and Statement III are correct and both of them explain Statement I
    2. Both Statement II and Statement III are correct but only one of them explains Statement I
    3. Only one of the Statements II and III is correct and that explains Statement I
    4. Neither Statement II nor Statement III is correct
    Carbon emissionsCement industryEnvironment
    View answer & explanation
  3. Q3 2025 Prelims GS

    Consider the following statements: Statement I: At the 28th United Nations Climate Change Conference (COP28), India refrained from signing the 'Declaration on Climate and Health'. Statement II: The COP28 Declaration on Climate and Health is a binding declaration; and if signed, it becomes mandatory to decarbonize the health sector. Statement III: If India's health sector is decarbonized, its resilience of health-care system may be compromised. Which one of the following is correct in respect of the above statements?

    1. Both Statement II and Statement III are correct and both of them explain Statement I
    2. Both Statement II and Statement III are correct but only one of them explains Statement I
    3. Only one of the Statements II and III is correct and that explains Statement I
    4. Neither Statement II nor Statement III is correct
    Climate policyCop28Environment
    View answer & explanation
  4. Q4 2025 Prelims GS

    Consider the following statements: Statement I: Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change. Statement II: Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets. Statement III: Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets. Which one of the following is correct in respect of the above statements?

    1. Both Statement II and Statement III are correct and both of them explain Statement I
    2. Both Statement II and Statement III are correct but only one of them explains Statement I
    3. Only one of the Statements II and III is correct and that explains Statement I
    4. Neither Statement II nor Statement III is correct
    Carbon marketsEnvironmentParis agreement
    View answer & explanation
  5. Q5 2025 Prelims GS

    With reference to 'Direct Air Capture', an emerging technology, which of the following statements is/are correct? I. It can be used as a way of carbon sequestration. II. It can be a valuable approach for plastic production and in food processing. III. In aviation, it can be a source of carbon for combining with hydrogen to create synthetic low-carbon fuel. Select the correct answer using the code given below.

    1. I and II only
    2. III only
    3. I, II and III
    4. None of the above statements is correct
    Direct air captureEnvironmentScience and technology
    View answer & explanation
  6. Q8 2025 Prelims GS

    With reference to the planet Earth, consider the following statements: I. Rain forests produce more oxygen than that produced by oceans. II. Marine phytoplankton and photosynthetic bacteria produce about 50% of world's oxygen. III. Well-oxygenated surface water contains several folds higher oxygen than that in atmospheric air. Which of the statements given above is/are correct?

    1. I and II
    2. II only
    3. I and III
    4. None of the above statements is correct
    EnvironmentOceanographyOxygen production
    View answer & explanation
  7. Q10 2025 Prelims GS

    Consider the following statements: Statement I: Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries. Statement II: Activated carbon has a very high surface area and has a strong capacity to adsorb heavy metals. Statement III: Activated carbon can be easily synthesized from environmental wastes with high carbon content. Which one of the following is correct in respect of the above statements?

    1. Both Statement II and Statement III are correct and both of them explain Statement I
    2. Both Statement II and Statement III are correct but only one of them explains Statement I
    3. Only one of the Statements II and III is correct and that explains Statement I
    4. Neither Statement II nor Statement III is correct
    Activated carbonEnvironmentPollution control
    View answer & explanation
  8. Q11 2025 Prelims GS

    The World Bank has warned that India could become one of the first places in which wet-bulb temperatures will routinely exceed 35°C. Which of the following statements best reflect(s) the implication of the above-said report? I. Peninsular India will most likely suffer from flooding, tropical cyclones and droughts. II. The survival of all living beings including humans will be affected because it will become difficult for them to shed their body heat through perspiration. Select the correct answer using the code given below.

    1. I only
    2. II only
    3. Both I and II
    4. Neither I nor II
    Climate changeEnvironmentWet-bulb temperature
    View answer & explanation
  9. Q13 2024 Prelims GS

    With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS), consider the following statements:
    1. PFAS are found in drinking water, food and food-packaging materials.
    2. PFAS are not easily degraded in the environment.
    3. Persistent exposure to PFAS can lead to bioaccumulation in animals.
    Which of the statements given above are correct?

    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
    EnvironmentEnvironmental pollutionPersistent chemicals
    View answer & explanation
  10. Q16 2024 Prelims GS

    Consider the following statements:
    Statement-I: The Indian Flying Fox is placed under the 'vermin' category in the Wild Life (Protection) Act, 1972.
    Statement-II: The Indian Flying Fox feeds on the blood of other animals.
    Which one of the following is correct in respect of the above statements?

    1. Both Statement-I and Statement-II are correct and Statement-II explains Statement-I.
    2. Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I.
    3. Statement-I is correct, but Statement-II is incorrect.
    4. Statement-I is incorrect, but Statement-II is correct.
    EnvironmentIndian flying foxWildlife conservation
    View answer & explanation
  11. Q18 2024 Prelims GS

    Consider the following statements:
    Statement-I: Many chewing gums found in the market are considered a source of environmental pollution.
    Statement-II: Many chewing gums contain plastic as gum base.
    Which one of the following is correct in respect of the above statements?

    1. Both Statement-I and Statement-II are correct and Statement-II explains Statement-I.
    2. Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I.
    3. Statement-I is correct, but Statement-II is incorrect.
    4. Statement-I is incorrect, but Statement-II is correct.
    Chewing gum wasteEnvironmentEnvironmental pollution
    View answer & explanation
  12. Q20 2024 Prelims GS

    Consider the following statements regarding World Toilet Organization:
    1. It is one of the agencies of the United Nations.
    2. World Toilet Summit, World Toilet Day and World Toilet College are the initiatives of this organization, to inspire action to tackle the global sanitation crisis.
    3. The main focus of its function is to grant funds to the least developed countries and developing countries to achieve the end of open defecation.
    Which of the statements given above is/are correct?

    1. 2 only
    2. 3 only
    3. 1 and 2
    4. 2 and 3
    EnvironmentGlobal sanitation initiativesSanitation and public health
    View answer & explanation

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