UPPSC Pollution & Climate Change — Previous Year Questions

This page has 28 solved questions on Pollution & Climate Change across 7 papers (2019–2025). Every one is solved below — open a question for the answer, why it is right, and why each wrong option was written to tempt you.

UPPSC's published Prelims syllabus does not name this as a separate head. These questions come under Paper I head 6 — "General Issues on Environmental ecology, Bio-diversity and Climate Change- that do not require subject specialization".

1. 2025Q44With reference to 'ozone layer', which of the following statements is/are correct ? 1. Ozone layer shields the surface of the earth from the ultra-violet radiations from the sun. 2. Ozone depletion has been linked to the chlorofluorocarbons. Select the correct answer from the code given below : Code :Answer: B
2. 2025Q118Which of the following prepared the Annual Groundwater Quality Report 2024 ? 1. Central Pollution Control Board 2. Central Water Commission 3. Central Groundwater Board Select the correct answer from the code given below : Code :Answer: C
3. 2025Q142With reference to 'Delhi Government's Bio-decomposer and Spray Programme', which of the following statements is/are correct ? 1. The Bio-decomposer solution is provided free of cost to farmers to help convert stubble into manure. 2. The Bio-decomposer solution is prepared using a mix of several fungi. Select the correct answer using the code given below : Code :Answer: B
4. 2024Q47What does the Intergovernmental Panel on Climate Change (IPCC) emphasize regarding reductions in greenhouse gas (GHG) emission ? 1. Gradual and limited reductions are enough. 2. Deep, rapid and sustained reductions are essential. Select the correct answer from the codes given below :Answer: D
5. 2024Q108Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A) : CO2, SO2 and NO2 gases get dissolved in rain water and produce acid rain. Reason (R) : Atmospheric air is polluted due to high concentration of gases like carbon dioxide, sulphur dioxide and oxides of nitrogen. Select the correct answer from the codes given below :Answer: A
6. 2023Q45What was India's rank in the world greenhouse gases emission in 2022?Answer: A
7. 2023Q66Which of the following is not a biodegradable polluter?Answer: D
8. 2023Q110Biological Oxygen Demand (BOD) is a standard criterion for:Answer: B
9. 2022Q25Which of the following is NOT a green house gas ?Answer: C
10. 2022Q30In the context of permissible noise level match List – I with List – II and select the answer from the code given below the lists. List – I (Area) A. Residential area B. Silent zone C. Industrial area D. Commercial area List – II (Permissible Noise Level) 1. 50 db 2. 55 db 3. 65 db 4. 70 db Code :Answer: D
11. 2022Q37The main purpose of 'Ganga Action Plan' project, launched in 1985, wasAnswer: C
12. 2022Q72Photo chemical smog always containsAnswer: A
13. 2022Q84Which country has natural arsenic water contamination ?Answer: A
14. 2022Q108According to the annual 'Frontier Report -2022' released by U. N. Environment Programme, which Indian city has become the second most noise polluted city of the World ?Answer: A
15. 2022Q137On which date Ozone Day is observed ?Answer: A
16. 2021Q11Flyash pollution is caused byAnswer: C
17. 2021Q43'World Ozone Day' is celebrated onAnswer: C
18. 2021Q96With reference to 'NET - ZERO' goal for 2050, which of the following statements is/are correct? 1. It means that a country will bring down its emissions to zero by 2050. 2. It means that a country's emissions will be compensated by absorption and removal of green house gases from the atmosphere. Select the correct answer using the codes given below. Codes:Answer: B
19. 2021Q124The concept of 'carbon credit' originated fromAnswer: B
20. 2020Q1National Clean Air Programme has been launched by the Central Government in the yearAnswer: D
21. 2020Q75With reference to Eutrophication, which of the following statement(s) is/are correct ? 1. It decreases dissolved oxygen of water. 2. It is a phenomenon of nutrient enrichment of a water body. Select the correct answer from the codes given below.Answer: C
22. 2020Q83Without green house effect, the average temperature of earth surface would beAnswer: B
23. 2020Q139Which one of the following is NOT a greenhouse gas found naturally in the atmosphere?Answer: A
24. 2020Q146Which of the following are the impacts of Global Warming? 1. Rise in sea level 2. Melting of glaciers 3. Spread of diseases 4. Bleaching of Coral reefs Select the correct answer using the codes given below.Answer: D
25. 2019Q21With reference to Eutrophication, which of the following statements is/are correct ? 1. It is a phenomenon of nutrient enrichment of a water body. 2. It depletes dissolved oxygen of the water. Select the correct answer using the codes given below :Answer: C
26. 2019Q24Which one of the following is the well known example of bioindicator of air pollution ?Answer: A
27. 2019Q27The gas, which is emitted in the paddy fields and increases the earth's temperature isAnswer: D
28. 2019Q101Smog is essentially caused by the atmospheric presence ofAnswer: D