Climate Change and Pollution in India

Introduction

Climate change and pollution are interconnected environmental crises with far-reaching consequences for India's development trajectory. India, the world's third-largest emitter of greenhouse gases, faces a dual challenge -- accelerating economic growth while transitioning to a low-carbon pathway. Simultaneously, air, water, and soil pollution impose severe health and economic costs, with an estimated millions of premature deaths annually linked to pollution.

Climate Change Science

The Greenhouse Effect

The greenhouse effect is a natural process where certain atmospheric gases (water vapour, CO2, methane, nitrous oxide, ozone) trap infrared radiation re-emitted from the Earth's surface, keeping the planet approximately 33 degrees C warmer than it would otherwise be. Enhanced greenhouse effect refers to the intensification of this process due to human-driven increases in greenhouse gas concentrations since the Industrial Revolution.

Key Greenhouse Gases

IPCC Assessment Reports

The Intergovernmental Panel on Climate Change (IPCC), established in 1988 by WMO and UNEP, periodically publishes comprehensive assessment reports.

AR6 Synthesis Report (2023): Concluded that adverse climate impacts are already more far-reaching and extreme than anticipated. Limiting warming to 1.5 degrees C requires global emissions to peak before 2025 and be halved by 2030.

India's Climate Commitments

Paris Agreement (2015)

India ratified the Paris Agreement on 2 October 2016. The Agreement aims to limit global temperature rise to well below 2 degrees C, preferably 1.5 degrees C, above pre-industrial levels.

Common Mistake: The Paris Agreement (2015) is NOT legally binding in terms of emission reduction targets. Each country sets its own NDCs (Nationally Determined Contributions) voluntarily. Only the reporting and transparency mechanisms are mandatory. Contrast this with the Kyoto Protocol, which had legally binding targets for Annex I (developed) countries. UPSC tests this distinction repeatedly.

Panchamrit -- Five Climate Pledges (COP26, Glasgow, 2021)

Prime Minister Narendra Modi announced five climate targets at COP26 in November 2021:

Updated Nationally Determined Contributions (NDCs)

Lifestyle for Environment (LiFE)

Announced at COP26, LiFE promotes a mass movement for individual-level behavioural change to combat climate change, rooted in traditions of conservation and moderation.

National Action Plan on Climate Change (NAPCC)

Launched on 30 June 2008 by the Prime Minister's Council on Climate Change, the NAPCC outlines India's strategy through eight National Missions.

Pollution in India

Air Pollution

National Air Quality Index (NAQI / AQI)

Launched in 2014 by the Central Pollution Control Board (CPCB), the AQI uses a single number to communicate air quality to the public.

Pollutants Monitored: PM10, PM2.5, NO2, SO2, CO, O3, NH3, and Pb (8 pollutants).

Mnemonic: Remember the 8 AQI pollutants with "PM PM NO SO CO O AN PB" -- PM10, PM2.5, NO2, SO2, CO, O3 (ozone), NH3 (ammonia), Pb (lead). The AQI value is determined by the worst-performing pollutant on a given day (called the "predominant pollutant"). In Indian cities, PM2.5 is almost always the predominant pollutant in winter.

National Clean Air Programme (NCAP)

Launched in January 2019, NCAP targets 40% reduction in PM2.5 and PM10 concentrations by 2025--2026 in 131 non-attainment cities (later revised to a target of 40% reduction by 2025--26 with the base year 2017--18).

Key Air Pollution Legislation

Water Pollution

Water Quality Parameters (CPCB)

Soil Pollution

Major causes include excessive use of pesticides and fertilisers, industrial waste, improper solid waste disposal, mining activities, and e-waste dumping. The Soil Health Card Scheme (launched 2015) promotes balanced use of fertilisers based on soil testing.

Swachh Bharat Mission (SBM)

Waste Management Rules

Environmental Impact Assessment (EIA)

The EIA Notification, 2006 (under EPA 1986) lays down the procedure for obtaining Environmental Clearance (EC) for development projects.

EIA Process -- Four Stages

Project Categories

National Green Tribunal (NGT)

Remember: NGT was established under the NGT Act, 2010 -- NOT under EPA 1986. This is a common Prelims trap. Also note: NGT does not cover the Wildlife (Protection) Act, 1972 under its Schedule I jurisdiction. Wildlife-related cases must go to regular courts or the Supreme Court.

Important for UPSC

Prelims Focus

• Greenhouse gases and their GWP values (CO2 = 1, CH4 ~27.9, N2O 273 — all IPCC AR6, 100-year GWP)
• IPCC Assessment Reports timeline (AR1 through AR6; AR6 published 2021--2023)
• Panchamrit five pledges: 500 GW non-fossil, 50% renewable, 1 billion tonnes reduction, 45% intensity cut, Net Zero 2070
• India's updated NDC: 45% emissions intensity reduction by 2030 and 47% by 2035
• NAPCC launch year (2008) and all 8 missions by name
• AQI categories (6), pollutants monitored (8), launched in 2014
• NCAP target: 40% reduction in particulate matter by 2025--26
• NGT establishment (2010), principal bench (New Delhi), disposal timeline (6 months)
• EIA Notification 2006: four stages (Screening, Scoping, Public Consultation, Appraisal)
• Ban on identified single-use plastics: 1 July 2022
• BS-VI emission norms: April 2020

Mains Dimensions

• GS3 (Environment): India's balancing act between development and climate commitments; effectiveness of NAPCC missions; EIA dilution debates; pollution-health nexus
• GS3 (Economy): Green finance; carbon markets; economic cost of air pollution (estimated at 1.4% of GDP); just energy transition for coal-dependent communities
• GS2 (Governance): Role of NGT in environmental governance; NGT vs High Courts -- jurisdictional overlaps; implementation gaps in waste management rules; Centre-State coordination on pollution control
• GS2 (International Relations): Climate justice -- Common But Differentiated Responsibilities (CBDR); India's position in UNFCCC negotiations; Loss and Damage Fund (COP27/COP28)
• GS1 (Geography): Impact of climate change on Indian monsoon patterns; Himalayan glacier retreat; sea-level rise threats to coastal cities
• Essay: "Climate change is the defining crisis of our time -- but it is also the greatest opportunity to reimagine progress."

Interview Angles

• Is India's Net Zero 2070 target ambitious enough compared to 2050 targets of developed nations?
• How can India simultaneously pursue industrialisation and decarbonisation?
• Should the EIA process be strengthened or streamlined for faster project approvals?
• What role should the judiciary (NGT, Supreme Court) play in environmental governance?
• Can individual lifestyle changes (LiFE mission) truly make a difference at scale?

Recent Developments (2024–2026)

2024 — Warmest Year on Record, 1.5°C Annual Threshold Breached

The World Meteorological Organisation (WMO) confirmed that 2024 was the warmest year in recorded history, with the global average surface temperature approximately 1.54°C above the pre-industrial baseline — becoming the first calendar year to breach the 1.5°C threshold that the Paris Agreement aims to keep warming "well below." The top 10 warmest years on record are all from the period 2014–2024.

The IPCC AR6 (Sixth Assessment Report, 2021–2023) confirms that human activities have warmed the climate by approximately 1.1°C since pre-industrial times, that every fraction of warming matters, and that limiting warming to 1.5°C requires reaching net zero CO₂ emissions globally by 2050. India's emissions grew by only 0.7% in 2024 — the slowest growth in decades, reflecting rapid clean energy deployment.

UPSC angle: 2024 as warmest year, 1.5°C breach, IPCC AR6 findings, and India's emissions trajectory are Prelims and Mains anchor facts for climate change questions.

COP29 Baku 2024 — Climate Finance Outcome

The UN Climate Change Conference COP29 (11–24 November 2024, Baku, Azerbaijan) agreed to the New Collective Quantified Goal (NCQG) on climate finance: developed countries committed to mobilising at least $300 billion per year for developing countries by 2035, with a broader aspiration of mobilising $1.3 trillion annually from all sources. India — along with other G77 nations — strongly criticised the outcome as "abysmally poor," having advocated for at least $1.3 trillion per year from public sources alone.

COP29 also made partial progress on Article 6 of the Paris Agreement governing carbon markets, establishing a centralised UN carbon market mechanism (Article 6.4 mechanism). India is positioning itself as a major supplier of carbon credits through the emerging domestic Carbon Credit Trading Scheme (CCTS).

UPSC angle: COP29 NCQG ($300 billion developed-country commitment, $1.3 trillion broader goal), India's criticism, Article 6.4 mechanism, and the climate finance gap are Mains GS-2/GS-3 content.

India's Updated NDC 2031–2035 — 47% Emissions Intensity, 60% Non-Fossil

India's Union Cabinet approved its updated Nationally Determined Contribution (NDC) for 2031–2035 in March 2026. Key targets: (a) reduce emissions intensity of GDP by 47% from 2005 levels by 2035 (up from 45% by 2030); (b) achieve 60% of installed power capacity from non-fossil fuel sources by 2035 (India already crossed 52.57% non-fossil capacity by February 2026); (c) expand carbon sink to 3.5–4 billion tonnes of CO₂ equivalent.

India's long-term goal remains net-zero emissions by 2070. The "Panchamrit" commitments (announced at COP26, Glasgow 2021) remain the foundation: 500 GW non-fossil capacity by 2030, 50% energy from renewables by 2030, reduce emissions intensity by 45% by 2030, and offset 1 billion tonnes of carbon by 2030.

UPSC angle: Updated NDC 2031–2035 targets (47% intensity, 60% non-fossil), Panchamrit, net-zero 2070, and India's achievement of 52.57% non-fossil capacity are critical Prelims/Mains facts.

Vocabulary

Mitigation

• Pronunciation: /ˌmɪtɪˈɡeɪʃən/
• Definition: In climate science, a human intervention to reduce the sources of greenhouse gas emissions or enhance the sinks that absorb them, thereby slowing the rate of climate change.
• Origin: From Latin mītigātiō ("a soothing, assuaging"), from mītigāre ("to soften, make mild"), from mītis ("soft, mild") + agere ("to do, drive").

Adaptation

• Pronunciation: /ˌædæpˈteɪʃən/
• Definition: The process of adjustment to actual or expected climate change and its effects, in order to moderate harm or exploit beneficial opportunities.
• Origin: From French adaptation, from Medieval Latin adaptātiō, from Latin adaptāre ("to fit, adjust"), from ad- ("to") + aptāre ("to fit"), from aptus ("fit, suitable").

Sequestration

• Pronunciation: /ˌsiːkwɛˈstreɪʃən/
• Definition: The process of capturing and storing atmospheric carbon dioxide, either through natural means such as forests and soils or through technological methods such as carbon capture and underground storage.
• Origin: From Latin sequestrātiō ("a depositing"), from sequestrāre ("to commit for safekeeping"), from sequester ("trustee, mediator").

Key Terms

Paris Agreement

• Pronunciation: /ˈpærɪs əˈɡriːmənt/
• Definition: A legally binding international treaty on climate change adopted by 196 parties at COP21 in Paris on 12 December 2015, aiming to limit global temperature rise to well below 2 degrees C above pre-industrial levels with efforts to limit it to 1.5 degrees C, through a bottom-up system of voluntary Nationally Determined Contributions (NDCs) that each country sets and updates every five years with increasing ambition (the "ratchet mechanism"). The agreement entered into force on 4 November 2016 after crossing the dual threshold of 55 parties representing 55% of global emissions.
• Context: Named after Paris, France, where COP21 was held. India ratified the agreement on 2 October 2016. Unlike the Kyoto Protocol (top-down, legally binding targets for Annex I countries only), the Paris Agreement uses a bottom-up "pledge and review" approach where all countries — developed and developing — submit NDCs. What IS legally binding is the process: countries MUST submit NDCs, participate in the Global Stocktake (every 5 years), and update targets. The first Global Stocktake (COP28, 2023) found the world is not on track for 1.5 degrees C and projected 2.4-2.6 degrees C warming under current policies. It produced the first-ever COP text calling for "transitioning away from fossil fuels" — historic language after 30 years of negotiations.
• UPSC Relevance: GS3 Environment and Climate Change. Prelims tests the 1.5/2 degrees C targets, adoption year (2015), entry into force (2016), India's ratification (2 October 2016), and the distinction that NDC targets are voluntary while the process (submission, review, update) is binding. Mains 2025 asked to review India's climate commitments and how they were strengthened at COP26 (Panchamrit pledges). Focus on: Paris vs Kyoto comparison (voluntary vs binding targets, universal vs Annex I only, bottom-up vs top-down), India's CBDR principle position, India's updated NDC (45% emissions intensity reduction by 2030), and the first Global Stocktake outcomes at COP28.

Nationally Determined Contributions

• Pronunciation: /ˈnæʃənəli dɪˈtɜːrmɪnd ˌkɒntrɪˈbjuːʃənz/
• Definition: National climate action plans submitted by each country under Article 4 of the Paris Agreement, outlining how it intends to reduce greenhouse gas emissions, adapt to climate impacts, and contribute to the global temperature goal. NDCs must be updated every five years with increasing ambition (the ratchet mechanism). India has submitted three iterations: the first NDC (2016: 33-35% emissions intensity reduction by 2030 from 2005 levels, 40% non-fossil power capacity), the updated NDC (August 2022: 45% emissions intensity reduction, 50% cumulative electric power from non-fossil sources, 500 GW non-fossil capacity by 2030), and the enhanced NDC (2026: 47% emissions intensity reduction by 2035).
• Context: NDCs evolved from the earlier concept of Intended Nationally Determined Contributions (INDCs) submitted before the Paris conference and converted to NDCs upon ratification. India's updated NDC (2022) formalised the Panchamrit pledges made by PM Modi at COP26 (Glasgow, November 2021): 500 GW non-fossil energy capacity by 2030, 50% energy from renewables by 2030, reduce total projected carbon emissions by 1 billion tonnes by 2030, reduce emissions intensity of GDP by 45% by 2030, and achieve net-zero emissions by 2070. India achieved a major milestone in June 2025 — reaching 50% of installed electricity capacity from non-fossil sources, more than five years ahead of the NDC target.
• UPSC Relevance: GS3 Environment. Prelims tests India's updated NDC targets (500 GW non-fossil capacity, 50% non-fossil power, 45% emissions intensity reduction by 2030, net-zero by 2070) and the distinction between INDCs and NDCs. Mains expects critical analysis of: whether India's NDCs are ambitious enough given the 1.5 degrees C carbon budget constraint, how the Panchamrit pledges at COP26 were formalised, the gap between NDC targets and implementation, and India's argument under CBDR that developed countries must provide climate finance before demanding greater ambition from developing nations. NDCs are the operational backbone of the Paris Agreement architecture.

Current Affairs Connect

Sources: Ministry of Environment, Forest and Climate Change (moef.gov.in); Press Information Bureau (pib.gov.in); Central Pollution Control Board (cpcb.nic.in); IPCC (ipcc.ch); UNFCCC (unfccc.int); National Green Tribunal (greentribunal.gov.in); India Code (indiacode.nic.in); PRS Legislative Research (prsindia.org).