Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — 1, 2 and 3
Concept & Option Breakdown
Standard Reference Verified- 1. Soot (Black Carbon): Absorbs incoming solar radiation directly in the atmosphere and reduces surface albedo when deposited on snow and ice, causing net warming.
- 2. Sulphur Hexafluoride (SF₆): An extremely potent synthetic greenhouse gas with a global warming potential (GWP) over 23,000 times that of CO₂ over a 100-year timescale.
- 3. Water Vapour: The most abundant greenhouse gas naturally present, responsible for amplifying atmospheric warming through positive climate feedback loops.
All three contribute to atmospheric warming.
Water vapour is the primary natural greenhouse gas, SF₆ is one of the Kyoto greenhouse gases, and black carbon/soot is a well-known short-lived climate pollutant.
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