GATE Global and Regional Environmental Issues: Global Effects of Air Pollution – Previous Year Questions

8 GATE previous year questions on Global Effects of Air Pollution (Global and Regional Environmental Issues, Environmental Science and Engineering) with answers and explanations, from every paper.

1. GATE 2021 ES Q29 (1 mark, Multiple select) – Which substances are both greenhouse gases and ozone-depleting substances?
2. GATE 2022 ES Q25 (1 mark, Multiple choice) – Which statement regarding global warming is correct?
3. GATE 2023 ES Q24 (1 mark, Multiple choice) – Which100-year GWP ordering is ascending?
4. GATE 2023 ES Q44 (2 marks, Multiple select) – Which urban-heat-island statement is NOT true? Select all that apply.
5. GATE 2024 ES Q21 (1 mark, Multiple choice) – Which is NOT a greenhouse gas in the conventional environmental classification?
6. GATE 2025 ES Q32 (1 mark, Multiple select) – Which statements about urban environments are correct?
7. GATE 2025 ES Q64 (2 marks, Numerical answer) – An industry emits CO₂5 kg/day, CH₄.5 kg/day, and N₂O.1 kg/day, but flares all methane before release. GWP factors are CO₂1,CH₄21,N₂O310. Find annual…
8. GATE 2026 ES Q32 (1 mark, Multiple select) – Which statements about global warming are correct? Select all that apply.