Climate Change — Revision Notes

⚡ 30-Second Revision

Definition: — Long-term shifts in global weather patterns, primarily human-induced GHG emissions.
Key GHGs: — CO2, CH4, N2O, HFCs, PFCs, SF6.
Constitutional: — Art 48A (State), Art 51A(g) (Citizen Duty), Art 253 (Intl. Agreements).
Legal: — EPA 1986, NAPCC 2008, Energy Conservation Act 2001.
Intl. Agreements: — UNFCCC (1992), Kyoto Protocol (1997), Paris Agreement (2015).
India's NDCs (2022): — 45% emissions intensity reduction (by 2030 from 2005), 50% non-fossil fuel capacity (by 2030), 2.5-3 billion tonnes carbon sink (by 2030).
Net Zero Target: — India by 2070.
IPCC: — Intergovernmental Panel on Climate Change, provides scientific assessments.
Mitigation: — Reduce GHG emissions (renewables, energy efficiency, carbon sinks).
Adaptation: — Adjust to impacts (resilient agriculture, water management, disaster preparedness).
Key Concepts: — Carbon sink, radiative forcing, CBDR, Loss & Damage, LiFE.

2-Minute Revision

Climate change signifies long-term shifts in global weather patterns, predominantly driven by human activities leading to an enhanced greenhouse effect. Key greenhouse gases like CO2, methane, and nitrous oxide trap heat, causing global warming.

India's constitutional framework, particularly Article 48A and 51A(g), underscores environmental protection, supported by laws like the EPA 1986 and the National Action Plan on Climate Change (NAPCC).

Internationally, the UNFCCC, Kyoto Protocol, and the landmark Paris Agreement guide global efforts. India's updated Nationally Determined Contributions (NDCs) commit to significant reductions in emissions intensity, increased non-fossil fuel energy capacity, and enhanced carbon sinks, aiming for net-zero by 2070.

Strategies involve both mitigation (reducing emissions through renewable energy, energy efficiency) and adaptation (building resilience through climate-resilient agriculture, water management). The IPCC provides the scientific basis for these actions.

Understanding the balance between India's development aspirations and climate commitments, alongside challenges like climate finance and technology transfer, is crucial for UPSC.

5-Minute Revision

Climate change, a critical global challenge, is defined by long-term alterations in global weather patterns, primarily due to anthropogenic emissions of greenhouse gases (GHGs) like CO2, CH4, and N2O, intensifying the natural greenhouse effect.

This leads to global warming, disrupting the carbon cycle and triggering amplifying climate feedback loops (e.g., ice-albedo, water vapour). India is highly vulnerable, experiencing erratic monsoons, agricultural distress, sea-level rise, and increased extreme weather events.

Constitutionally, Articles 48A and 51A(g) mandate environmental protection, while Article 253 facilitates international agreement implementation. Key legal frameworks include the Environment Protection Act 1986, the National Action Plan on Climate Change (NAPCC) with its eight missions, and the Energy Conservation Act 2001.

Globally, the UNFCCC provides the framework, with the Kyoto Protocol setting initial targets and the Paris Agreement (2015) introducing Nationally Determined Contributions (NDCs) for all nations. India's updated NDCs (2022) commit to a 45% reduction in emissions intensity by 2030 (from 2005 levels), 50% non-fossil fuel electricity capacity by 2030, and creating a 2.

5-3 billion tonne CO2 equivalent carbon sink by 2030, alongside promoting the 'LiFE' movement. India also targets net-zero emissions by 2070. Mitigation strategies focus on reducing GHG emissions through renewable energy transition, energy efficiency, and carbon sequestration.

Adaptation measures aim to build resilience to unavoidable impacts, including climate-resilient agriculture, improved water management, and robust disaster preparedness. Challenges persist in climate finance, technology transfer, and ensuring equity (Common But Differentiated Responsibilities - CBDR) in global efforts.

The IPCC's assessment reports provide the scientific bedrock for policy decisions. For UPSC, a holistic understanding of these scientific, policy, and socio-economic dimensions, with a strong focus on India's context and its role in global climate governance, is indispensable.

Prelims Revision Notes

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Definitions: — Climate Change (broad), Global Warming (temperature rise), Greenhouse Effect (natural vs. enhanced). Key GHGs: CO2 (most abundant), CH4 (potent), N2O, HFCs, PFCs, SF6. Sources of each. Carbon Cycle (natural vs. human disruption). Radiative Forcing. Climate Feedback Loops (Positive: Ice-albedo, Water Vapour, Permafrost Thaw).
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Constitutional & Legal: — Art 48A (State DPSP), Art 51A(g) (Citizen FD), Art 253 (Intl. Treaties). Environment Protection Act 1986 (umbrella legislation). National Action Plan on Climate Change (NAPCC) - 2008, 8 Missions (Solar, Water, Himalayan, Green India, etc.). Energy Conservation Act 2001 (BEE).
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International Agreements:

* UNFCCC (1992): Framework, annual COPs. Principle of CBDR. * Kyoto Protocol (1997): Legally binding targets for developed nations. India ratified 2002. * Paris Agreement (2015): Limit warming to <2°C, preferably 1.5°C. NDCs (Nationally Determined Contributions) - country-led targets. Global Stocktake. Loss & Damage Fund (operationalized COP28). India ratified 2016.

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India's Commitments:

* Updated NDCs (2022): 45% emissions intensity reduction by 2030 (from 2005). 50% non-fossil fuel capacity by 2030. 2.5-3 billion tonnes additional carbon sink by 2030. LiFE movement. * Net Zero Target: 2070.

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Mitigation vs. Adaptation: — Understand the difference and examples for each. Mitigation: Renewables (Solar, Wind, Hydro), Energy Efficiency, Carbon Sequestration (afforestation, CCUS), Carbon Trading (PAT scheme). Adaptation: Climate-resilient agriculture, water management, coastal protection, disaster preparedness.
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Key Bodies: — IPCC (scientific assessments), UNEP, WMO, Green Climate Fund (GCF).
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Recent Developments: — COP outcomes (e.g., COP28 Global Stocktake, Loss & Damage Fund), India's Green Hydrogen Mission, LiFE movement's global traction. Focus on specific targets and new initiatives.

Mains Revision Notes

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Conceptual Clarity & Interlinkages: — Beyond definitions, understand the 'why' and 'how'. Connect climate change to: GS-I (Geography: monsoon, glaciers, sea-level rise), GS-II (Polity: constitutional provisions, international relations: climate diplomacy, CBDR, climate justice), GS-III (Economy: green growth, energy security, agriculture; Environment: biodiversity loss, pollution; S&T: renewable tech, CCUS; Disaster Management: extreme events, preparedness).
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India-Specific Impacts & Data: — Provide concrete examples and data points for impacts on agriculture (yields, monsoon variability), water resources (scarcity, glacial melt), coastal areas (erosion, sea-level rise), health (heatwaves, vector-borne diseases), and biodiversity. Case studies (Kerala floods, Chennai water crisis, Himalayan retreat) are valuable.
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Policy Analysis (National): — Critically evaluate NAPCC's missions, their implementation, successes, and challenges. Discuss the role of other policies like FAME India, PLI schemes for green tech. Analyze India's NDCs – ambition, feasibility, financial/technological requirements. Emphasize the 'LiFE' movement as India's unique contribution.
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Policy Analysis (International): — Discuss the evolution of international climate governance (UNFCCC to Paris Agreement). Analyze the principles of CBDR and climate justice from India's perspective. Examine challenges in climate finance ($100 billion goal), technology transfer, and the operationalization of Loss and Damage Fund. India's role as a bridge-builder.
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Mitigation & Adaptation Strategies: — Detail both. For mitigation, focus on India's renewable energy push, energy efficiency, and carbon sink enhancement. For adaptation, discuss climate-resilient agriculture, water management, coastal zone management, and disaster risk reduction. Highlight ecosystem-based approaches.
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Challenges & Way Forward: — Financial constraints, technological gaps, capacity building, political will, balancing development with climate action, equity concerns. Conclude with a balanced perspective, emphasizing sustainable development, green growth, international cooperation, and local community participation as essential for a climate-resilient future.

Vyyuha Quick Recall

Remember the key aspects of Climate Change with the 'CLIMATE' acronym:

Causes: Human activities, GHG emissions, Enhanced Greenhouse Effect. Legal Frameworks: Constitutional (Art 48A, 51A(g)), National (EPA, NAPCC), International (UNFCCC, Paris Agreement). Impacts: India-specific (Monsoon, Agriculture, Sea-level, Glaciers, Heatwaves) and Global.

Mitigation: Reduce emissions (Renewables, Energy Efficiency, Carbon Sinks). Adaptation: Adjust to impacts (Resilient Agriculture, Water Management, Disaster Prep). Technology & Targets: Green Hydrogen, CCUS, India's NDCs (2030), Net Zero (2070).

Evaluation & Equity: IPCC, CBDR, Climate Finance, Loss & Damage, LiFE.