Greenhouse Gases — Prelims Strategy

Prelims Strategy

For Prelims, a strong factual foundation on Greenhouse Gases is non-negotiable. Begin by memorizing the six major GHGs recognized by UNFCCC (CO2, CH4, N2O, HFCs, PFCs, SF6) and their approximate Global Warming Potentials (GWPs) and atmospheric lifetimes.

Pay special attention to the relative GWPs (e.g., SF6 > N2O > CH4 > CO2). Understand the primary natural and anthropogenic sources for each gas with specific examples (e.g., CH4 from rice paddies and livestock; N2O from fertilizers).

Focus on India-specific data: major emitting sectors (energy, agriculture), and key policy initiatives like NAPCC missions and updated NDCs (targets and timelines). Practice MCQs that involve matching gases with sources, comparing GWPs, and identifying correct statements about India's climate commitments.

Be aware of recent IPCC findings on atmospheric concentrations and global emission trends. Use mnemonics and comparison tables for quick recall. The 'Vyyuha Quick Recall' mnemonic 'MAIN-F' will be particularly helpful for this.

Also build Paper II skills

Climate data, pollution metrics, and treaty timelines are natural practice for CSAT data interpretation and careful reading. CSAT hub.

• Data interpretation
• Correlation vs causation
• Estimation techniques