UPSC Prelims PYQ

UPSC Prelims Environment and ecology Questions

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

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Questions: 38
Years covered: 2017–2024
Exam years: 4
With answers: 38

Environment and ecology questions by year

20242 2019 🔒18 2018 🔒11 2017 🔒7

UPSC Prelims Environment and ecology Questions

1–2 of 2

Q1 2024 Prelims GS

Consider the following materials:
1. Agricultural residues
2. Corn grain
3. Wastewater treatment sludge
4. Wood mill waste
Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?
1. 1 and 2 only
2. 3 and 4 only
3. 1, 2, 3 and 4
4. 1, 3 and 4 only
Biofuel feedstocksEnvironment and ecologySustainable aviation fuel
View answer & explanation
Q2 2024 Prelims GS

According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions?
1. Locomotives using fossil fuels
2. Ships using fossil fuels
3. Extraction of metals from ores
4. Power plants using fossil fuels
Air pollutionEnvironment and ecologyMajor emission sources
View answer & explanation

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