By the end of this chapter you'll be able to…

  • 1Explain the concept of 'global commons' and identify the four global commons (atmosphere, oceans, Antarctica, outer space)
  • 2Trace the history of international environmental negotiations from Stockholm (1972) to Paris (2015)
  • 3Explain the principle of Common But Differentiated Responsibilities (CBDR) and the North-South debate over climate action
  • 4Describe India's position in international climate negotiations — per capita argument, CBDR, Net Zero by 2070, renewable targets
  • 5Evaluate the effectiveness of the Paris Agreement compared to the Kyoto Protocol
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Why this chapter matters
This chapter covers global environmental politics — the negotiations, the principles, and the North-South divide over who should pay for climate action. CBSE examiners test: the global commons concept, key environmental summits (Stockholm 1972 → Rio 1992 → Kyoto 1997 → Paris 2015), the CBDR principle, and India's position on climate negotiations. The chapter directly links to CBSE Geography chapters on water resources and sustainability, and to current affairs (Paris Agreement NDCs, COP summits).

Environment and Natural Resources

Introduction

Environmental issues — climate change, biodiversity loss, water scarcity — are SECURITY problems. They are DEVELOPMENT problems. They are JUSTICE problems. They do NOT respect national borders. This chapter examines global environmental politics: the global commons, the North-South debate over responsibility and costs, key international agreements, and the role of movements.

1. The Global Commons

The GLOBAL COMMONS are resources outside any single state's jurisdiction — requiring COLLECTIVE governance:

CommonsChallenge
The AtmosphereCarbon emissions. The atmosphere's capacity to absorb them is FINITE.
The OceansOverfishing. Plastic pollution. Acidification. Rising sea levels.
BiodiversitySixth mass extinction — caused by human activity.
Outer SpaceSpace debris. Militarisation of space.

The Tragedy of the Commons: When a shared resource is DEPLETED because each individual acts in their own self-interest. 'If I don't take the fish, someone else will.' Result: the resource is destroyed.

2. The North-South Debate — Who Is Responsible?

Global North's PositionGlobal South's Position
Everyone must reduce emissions NOW.The North CAUSED the problem — 200 years of industrial emissions. Now it tells us we can't develop.
China and India are now the largest emitters.The North's HISTORICAL and PER CAPITA emissions are FAR higher. Average American: ~15 tonnes/year. Average Indian: ~2 tonnes.

Common But Differentiated Responsibilities (CBDR)

Adopted at the 1992 Rio Earth Summit. ALL countries have responsibility — BUT developed countries have GREATER responsibility (historical emissions) and GREATER CAPABILITY (finance and technology). They must provide CLIMATE FINANCE to help developing countries transition.

Key Agreements

AgreementYearKey Features
UNFCCC1992Framework convention. Annual COP meetings. CBDR principle.
Kyoto Protocol1997BINDING targets for DEVELOPED countries only. US never ratified.
Paris Agreement2015VOLUNTARY targets (NDCs) for ALL countries. Limit warming to 1.5-2°C.
Loss and Damage Fund2022Developed countries to COMPENSATE developing countries for climate damage.

3. Environmental Movements

MovementSignificance
Chipko (India, 1970s)Women hugged trees to prevent logging — global symbol of environmental resistance
Narmada Bachao AndolanRaised questions about 'development' — for whom, at what cost
Fridays for Future (2018+)Greta Thunberg. Youth climate strikes. 'You have stolen my dreams.'

4. Exam Focus

Question TypeMarksLikely Topics
Short Answer4What are global commons? Why do they require collective action?
Short Answer4Explain the North-South debate on climate responsibility
Short Answer2What is CBDR? Key climate agreements (Kyoto, Paris)

Self-Test

Q1. What are the GLOBAL COMMONS? Why do they need collective governance? A1. Resources outside any state's jurisdiction: atmosphere, oceans, biodiversity, outer space. They need COLLECTIVE GOVERNANCE because: (1) No single country can protect them alone. (2) Tragedy of the Commons — each acting in self-interest depletes the shared resource. (3) Actions in one country affect ALL. Protection requires international agreements — but countries often free-ride. 'The global commons are everyone's property — and therefore no one's responsibility, unless we MAKE them so.'

Q2. Explain the NORTH-SOUTH DEBATE on climate change. A2. The North: all must reduce emissions now. The South: The North CAUSED the problem through 200 years of industrialisation and got RICH. The North's per capita emissions are far higher (~15 tonnes/year American vs ~2 tonnes/year Indian). The South has a RIGHT TO DEVELOP. RESOLUTION: CBDR — all have responsibility, but developed countries have GREATER responsibility and must provide CLIMATE FINANCE and technology. Paris Agreement (2015): voluntary targets for all. Loss and Damage Fund (2022): compensation for climate damage.

Key formulas & results

Everything you need to memorise, in one card. Screenshot this for revision.

Global Commons — Definition and Four Types
GLOBAL COMMONS: Resources that are NOT owned by any nation-state and are shared by all humanity. They belong to everyone — and therefore, to no one. FOUR GLOBAL COMMONS: (1) THE ATMOSPHERE: The shared air we breathe and the climate system. Absorbs our greenhouse gases. 'The atmosphere has become a global dump for CO₂.' (2) THE HIGH SEAS (INTERNATIONAL WATERS): Oceans beyond 200 nautical miles from any coast (Exclusive Economic Zone ends at 200 nm). Freedom of navigation. Rich in fish and minerals — subject to overuse. (3) ANTARCTICA: The southern continent governed by the Antarctic Treaty System (1959). No territorial claims allowed. International scientific cooperation. Protected from military activity. (4) OUTER SPACE: No country can claim sovereignty over outer space or celestial bodies (Outer Space Treaty, 1967). Shared satellite orbits. Growing tension over commercial use (SpaceX, OneWeb). 'TRAGEDY OF THE COMMONS' (Garrett Hardin, 1968): When a resource is shared and no one owns it, each individual has an incentive to over-exploit it ('rational self-interest') → collective over-exploitation → resource is destroyed. Climate change is the ultimate tragedy of the commons: each country's industry gains from emitting CO₂, while the cost is shared by all humanity.
CBSE tests: 'What are global commons? Name them.' Four global commons + the concept of tragedy of the commons. The Tragedy of the Commons is a key analytical concept for explaining why climate change negotiations are so difficult.
Environmental Summits — Chronology and Outcomes
1972 — STOCKHOLM CONFERENCE (UN Conference on the Human Environment): First major UN conference on environment. 'Only One Earth.' Established UNEP (United Nations Environment Programme). Set the precedent for global environmental governance. 1987 — BRUNDTLAND COMMISSION (World Commission on Environment and Development): Produced 'Our Common Future.' Defined SUSTAINABLE DEVELOPMENT: 'Development that meets the needs of the present without compromising the ability of future generations to meet their own needs.' 1992 — RIO EARTH SUMMIT (UNCED, Rio de Janeiro): UNFCCC (United Nations Framework Convention on Climate Change) — the foundational climate treaty. Convention on Biological Diversity. Agenda 21 (sustainability action plan). 1997 — KYOTO PROTOCOL: First binding emission reduction targets — but ONLY FOR DEVELOPED COUNTRIES (Annex-I). Developing countries including India and China: EXEMPT. USA NEVER ratified it. Target: reduce emissions to 5% below 1990 levels by 2008–2012. FAILED to prevent emissions growth. 2015 — PARIS AGREEMENT: ALL countries (not just developed) commit to reducing emissions. Nationally Determined Contributions (NDCs) — each country sets its own targets. Goal: limit warming to well below 2°C above pre-industrial levels, pursuing 1.5°C. Enhanced NDCs to be submitted every 5 years (ratchet mechanism). USA under Trump withdrew (2017), rejoined under Biden (2021).
CBSE tests the summary of each summit in one line. Chronology: 1972 → 1987 → 1992 → 1997 → 2015. The KEY DIFFERENCE between Kyoto (1997) and Paris (2015) is: Kyoto = only developed countries had binding targets; Paris = all countries have voluntary targets (NDCs).
CBDR — Common But Differentiated Responsibilities
DEFINITION: The principle that ALL countries share the COMMON responsibility to protect the global environment. BUT the responsibility is DIFFERENTIATED — developed countries (which industrialised first and are primarily responsible for historical emissions) have GREATER responsibility AND greater capacity to act. RATIONALE: The atmosphere currently contains CO₂ accumulated since the Industrial Revolution (~1760). The USA, EU, UK, Japan, Canada have emitted the vast majority of historical emissions. Developing countries — India, Africa, most of Asia — have contributed minimally. Yet they suffer the most severe impacts of climate change (Bangladesh, Maldives, sub-Saharan Africa). NORTH-SOUTH DEBATE: GLOBAL NORTH says: 'ALL countries must act urgently. Emissions from China and India are now large enough to matter. You can't exempt the world's largest emitters.' GLOBAL SOUTH says: 'You caused this problem by industrialising over 250 years. We are still lifting people out of poverty. We will not sacrifice development to fix a mess we didn't create. You must provide CLIMATE FINANCE and TECHNOLOGY TRANSFER.' RESOLUTION (Paris Agreement): NDCs for all countries, with recognition that developed countries should lead on ambition and provide financing to developing countries.
CBDR stands for 'Common But Differentiated Responsibilities' — memorise the full phrase. It is the CENTRAL PRINCIPLE of global climate negotiations and appears in almost every CBSE board question on this topic.
India's Position in Climate Negotiations
INDIA'S CURRENT EMISSIONS: Third-largest annual CO₂ emitter (~2.9 billion tonnes, 2023) — after China (~12B) and USA (~5B). BUT: PER CAPITA EMISSIONS: India's per capita = ~2 tonnes/person/year. USA = ~14 tonnes. China = ~8 tonnes. EU average = ~7 tonnes. HISTORICAL CONTRIBUTION: India has contributed only 3–4% of cumulative CO₂ since 1750. USA alone: ~25%. EU: ~22%. INDIA'S NEGOTIATING POSITION: (a) CBDR — India will grow but will grow green; cannot be asked to sacrifice development. (b) Per capita fairness: India's per capita emissions are a fraction of developed countries — any global per capita cap must be fair to India. (c) Climate Finance: Developed countries must provide $100 billion/year (Green Climate Fund, Paris pledge) to help developing countries transition. (d) Technology Transfer: clean technologies (solar, EV) should be made available without restrictive patents. INDIA'S COMMITMENTS: Paris Agreement NDCs (updated 2022): 500 GW renewable energy capacity by 2030. 50% of electricity from non-fossil sources by 2030. Reduce GDP emissions intensity by 45% by 2030 (vs 2005 levels). NET ZERO BY 2070. India's solar programme is one of the world's largest — ~175 GW installed capacity in 2024.
India is both a large emitter (total, 3rd globally) AND a small emitter (per capita, much lower than developed world). This distinction IS the basis of India's climate negotiating position. Know both the total and per capita figures.
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Common mistakes & fixes

These are the exact errors that cost students marks in board exams. Read them once, save yourself the trouble.

WATCH OUT
Saying developing countries are exempt from all climate obligations under the Paris Agreement
Under the KYOTO PROTOCOL (1997), developing countries were EXEMPT from binding emission targets. But the PARIS AGREEMENT (2015) requires ALL countries — including developing ones like India and China — to submit Nationally Determined Contributions (NDCs). The difference is that NDCs are VOLUNTARY (countries set their own targets) rather than externally imposed binding targets. India, China, and all other countries have submitted NDCs. The principle of CBDR still applies — developed countries are expected to have more ambitious targets and provide climate financing — but developing countries are no longer exempt.
WATCH OUT
Confusing the Brundtland Commission (1987) with the Rio Earth Summit (1992)
The Brundtland Commission (1987) — officially the World Commission on Environment and Development — was a UN commission that produced the report 'Our Common Future' and defined 'sustainable development.' It was NOT a government summit. The RIO EARTH SUMMIT (1992) was a government conference where the UNFCCC treaty was signed. Brundtland Commission → defined sustainable development. Rio Summit → created the UNFCCC. Different years, different events.

Practice problems

Try each one yourself before tapping "Show solution". Active recall > rereading.

Q1EASY· global-commons
What are global commons? Name the four global commons and explain the 'tragedy of the commons.'
Show solution
GLOBAL COMMONS: Resources that are not owned by any single nation-state and belong to all of humanity — they are held in common. Because no one owns them, they are vulnerable to overuse and degradation. THE FOUR GLOBAL COMMONS: (1) THE ATMOSPHERE — shared air and climate system; absorbs greenhouse gases from all countries. (2) THE HIGH SEAS (international waters beyond 200 nautical miles) — freedom of navigation; rich fisheries. (3) ANTARCTICA — governed by the Antarctic Treaty System (1959); no territorial claims allowed. (4) OUTER SPACE — no national sovereignty; governed by the Outer Space Treaty (1967). THE TRAGEDY OF THE COMMONS (Garrett Hardin, 1968): When a resource is shared by all and owned by none, each individual (or country) has an incentive to use as much as possible to maximise their own gain. If everyone does this, the shared resource is OVER-EXPLOITED and eventually DESTROYED. CLIMATE CHANGE EXAMPLE: Every country's industry gains from emitting CO₂ (cheap energy, economic growth). The COST of that CO₂ — climate change — is shared by all humanity. No country has an individual incentive to reduce emissions if others don't. This is why climate action requires INTERNATIONAL COOPERATION — the tragedy of the commons cannot be solved by individual countries acting alone.
Q2MEDIUM· kyoto-vs-paris
Compare the Kyoto Protocol (1997) with the Paris Agreement (2015). Why is the Paris Agreement considered an improvement?
Show solution
KYOTO PROTOCOL (1997): WHAT: First international treaty with LEGALLY BINDING emission reduction targets. Countries: Only ANNEX-I (developed countries — USA, EU, Japan, Canada, Australia, Russia). Developing countries including India, China, Brazil: COMPLETELY EXEMPT from binding targets. TARGETS: Reduce emissions to 5% below 1990 levels by 2008–2012. PROBLEMS: (1) USA never ratified Kyoto — the world's largest emitter at the time refused to be bound. (2) China and India grew rapidly through the 2000s; Kyoto's exemption covered 45% of global emissions by 2010. (3) Canada withdrew in 2011. (4) Global emissions grew ~30% between 1997 and 2012 despite Kyoto. PARIS AGREEMENT (2015): WHAT: Framework where ALL countries (196 nations) commit to reducing emissions through Nationally Determined Contributions (NDCs). GOAL: Keep warming 'well below 2°C' and pursue efforts toward 1.5°C. NDCs: Each country sets its own targets — voluntary but submitted formally to the UN. Five-year review mechanism ('ratchet') requires countries to strengthen NDCs over time. CLIMATE FINANCE: Developed countries commit to providing $100 billion/year to developing countries. USA rejoined under Biden (2021, after Trump withdrew in 2017). WHY PARIS IS BETTER: (1) UNIVERSAL: All 196 countries including China (now world's largest emitter) and India have NDCs — no free riders. (2) FLEXIBLE: Countries set their own targets based on their circumstances. (3) DYNAMIC: Five-year review mechanism creates a mechanism for increasing ambition. (4) POLITICALLY DURABLE: Voluntary NDCs are more likely to be actually implemented than externally imposed targets. LIMITATION OF PARIS: NDCs are NOT legally binding — countries can submit weak targets and there is no enforcement mechanism. Current NDCs, if implemented, would limit warming to ~2.5–3°C — not 1.5°C. Implementation remains the challenge.
Q3HARD· cbdr-india
Explain the principle of CBDR. What is the North-South debate on climate change, and what is India's position?
Show solution
COMMON BUT DIFFERENTIATED RESPONSIBILITIES (CBDR): DEFINITION: The principle that ALL countries share a COMMON responsibility to protect the global environment, but this responsibility is DIFFERENTIATED based on each country's historical contribution to environmental damage and its current capacity to act. ORIGIN: Incorporated into the UNFCCC (1992) and the Rio Declaration. The principle recognises that: (a) The Industrial Revolution (1760–1900) was powered by burning fossil fuels — primarily by Europe and North America. (b) The accumulated CO₂ in the atmosphere today is primarily the result of 250 years of Western and Japanese industrialisation. (c) Developing countries are mostly recent industrialisers with much lower per capita emissions. (d) Yet developing countries — especially small island states and low-lying coastal nations — bear the most severe consequences of climate change. THE NORTH-SOUTH DEBATE: GLOBAL NORTH (USA, EU, Japan): 'Climate action must be universal and urgent. China is now the world's largest emitter (12 billion tonnes/year), India the third largest (2.9 billion tonnes). You cannot claim to be developing countries while building hundreds of coal plants. All large emitters must cut.' GLOBAL SOUTH (India, China, Brazil, Africa): 'This is a historical problem created by 250 years of Northern industrialisation. The atmosphere is already full of carbon you put there. We are still lifting hundreds of millions out of poverty — do not ask us to sacrifice development to solve a problem we didn't create. Provide CLIMATE FINANCE (the promised $100 billion/year, largely undelivered) and TECHNOLOGY TRANSFER (clean energy tech without restrictive patents).' INDIA'S SPECIFIC POSITION: India is in a unique position — large total emitter (#3 globally) but tiny per capita emitter (~2 tonnes vs USA's ~14). INDIA'S ARGUMENTS: (1) HISTORICAL RESPONSIBILITY: India has contributed only 3–4% of cumulative CO₂ since 1750. USA alone has contributed ~25%. The CBDR principle means India's obligation is proportional to its contribution. (2) DEVELOPMENTAL NEED: India is still a developing country — ~700 million people without adequate electricity, 300 million+ in moderate to extreme poverty. Economic growth requires energy. (3) PER CAPITA FAIRNESS: Any climate agreement must be based on per capita equity — one atmosphere, equal access per person. India's per capita emissions would have to be allowed to rise several times before reaching current EU levels. (4) CLIMATE FINANCE: India has repeatedly called on developed countries to honour the $100 billion/year climate finance commitment — largely undelivered. INDIA'S COMMITMENTS DESPITE CONSTRAINTS: India has made ambitious commitments in recognition of its climate vulnerability: Net Zero by 2070; 500 GW renewable capacity by 2030; 50% electricity from renewables by 2030. India's solar programme is one of the world's largest. 'India will grow — but we will grow green.' CONCLUSION: The CBDR principle is not a way for India to avoid climate action — India is acting ambitiously. It is a way to frame climate action FAIRLY — so that the burden of addressing a problem primarily caused by rich countries is not borne primarily by poor ones.

5-minute revision

The whole chapter, distilled. Read this the night before the exam.

  • Global commons: atmosphere, high seas (beyond 200nm), Antarctica (Antarctic Treaty 1959), outer space (Outer Space Treaty 1967).
  • Tragedy of the commons (Hardin, 1968): shared resource → individual incentive to over-exploit → collective destruction.
  • Stockholm 1972: First UN environment conference. UNEP created. 'Only One Earth.'
  • Brundtland Commission 1987: Defined sustainable development: 'meeting present needs without compromising future generations.'
  • Rio Earth Summit 1992: UNFCCC created (climate treaty). Convention on Biological Diversity. Agenda 21.
  • Kyoto Protocol 1997: Binding targets for developed (Annex-I) countries only. Developing countries (India, China) exempt. USA never ratified. Failed.
  • Paris Agreement 2015: All countries have NDCs (voluntary). Well below 2°C goal. Five-year review. Climate finance: $100B/year.
  • CBDR: Common But Differentiated Responsibilities. All share responsibility; developed countries have greater obligations (caused the problem + greater capacity).
  • India: #3 emitter (2.9B tonnes). Per capita ~2 tonnes. Net Zero 2070. 500 GW renewable by 2030. Historically contributed 3–4% of cumulative CO₂.
  • North-South debate: North = all must act (China, India large emitters). South = historical justice (you caused it, you pay). CBDR is the resolution.

CBSE marks blueprint

Where the marks come from in this chapter — so you can plan your prep.

Typical chapter weightage: 3-5 marks

Question typeMarks eachTypical countWhat it tests
Short Answer31Four global commons; CBDR definition; Brundtland Commission (1987); Kyoto Protocol key feature; India's climate position
Long Answer50-1Kyoto vs Paris comparison; CBDR and North-South debate; India's climate position; global commons and tragedy of the commons
Prep strategy
  • Summit timeline must be memorised: 1972 Stockholm (UNEP created), 1987 Brundtland (defined sustainable development), 1992 Rio (UNFCCC created), 1997 Kyoto (binding targets for developed countries only), 2015 Paris (NDCs for all countries).
  • CBDR full form: Common But Differentiated Responsibilities. Define it: all countries share responsibility but developed countries bear more because they caused the problem and have greater capacity.
  • India facts: #3 emitter globally (~2.9B tonnes/year), BUT per capita only ~2 tonnes (vs USA ~14). Net Zero by 2070. 500 GW renewable by 2030.

Where this shows up in the real world

This chapter isn't just an exam topic — it lives in the world around you.

COP29 (2024, Baku, Azerbaijan) — Climate Finance

The 2024 UN Climate Summit (COP29) in Baku, Azerbaijan finalised a new climate finance target — $300 billion/year to developing countries by 2035 (up from the $100 billion/year 2020 goal that was mostly unmet). India and other G77 countries argued for $1 trillion/year as genuinely needed. The new target was criticised by developing countries as grossly insufficient. The COP29 outcome directly illustrates the North-South debate, CBDR, and the politics of climate finance that this CBSE chapter covers.

Exam strategy

Battle-tested tips from teachers and toppers for this chapter.

  1. For 'What is CBDR?' — the three-sentence answer: (1) define it (all share responsibility, but differentiated based on historical contribution + capacity), (2) justify it (developed countries caused most historical emissions), (3) apply to India (India will act but proportionally — per capita emissions are low). Three sentences = full marks for a 3-mark question.
  2. For Kyoto vs Paris, use a two-column table: Binding targets vs voluntary NDCs; developed only vs all countries; no review mechanism vs 5-year ratchet; USA never ratified vs almost universal. Four rows = comprehensive comparison.

Going beyond the textbook

For olympiad aspirants and curious learners — topics that build on this chapter.

  • Read NAOMI KLEIN's 'This Changes Everything: Capitalism vs. the Climate' (2014) — a radical argument that the climate crisis cannot be solved without fundamentally changing the global economic system. Klein argues that the CBDR debate misses the point: both Northern and Southern elites benefit from fossil fuels, and the victims are the poor everywhere. Her work connects climate politics to global inequality in a way the NCERT chapter only hints at.
  • Study the LOSS AND DAMAGE debate at COP27 (Sharm el-Sheikh, 2022) — developing countries secured a new 'Loss and Damage Fund' for climate impacts that cannot be avoided through mitigation or adaptation. This represents a third category beyond 'mitigation' (reducing emissions) and 'adaptation' (adjusting to climate change) — compensation for damage already done. India has been a key advocate for Loss and Damage.

Where else this chapter is tested

CBSE board isn't the only one — other exams test this chapter too.

CBSE Class 12 Board (Political Science)High
UPSC Prelims (Environment, International Relations)High
CUET (Political Science)Medium

Questions students ask

The real ones — pulled from the Q&A community and tutor sessions.

BOTH — and understanding why is important. VICTIM: India is one of the world's most climate-vulnerable countries. It ranks in the top 10 of the Global Climate Risk Index. 600 million Indians are directly dependent on climate-sensitive sectors (agriculture, forestry, fishing). Himalayan glacier retreat threatens rivers supplying water to 700 million. Cyclones (increasingly intense: Fani 2019, Amphan 2020, Tauktae 2021) hit India's coasts. Sea level rise threatens Mumbai, Chennai, Kolkata. VILLAIN (the Western critique): India's absolute emissions are the world's third-largest. India continues building coal power plants. India's coal phase-down pledge at COP26 (Glasgow, 2021) was watered down at the last minute from 'phase out' to 'phase down.' India's $100 billion/year climate finance demand delays action while negotiations continue. INDIA'S DEFENCE: Per capita emissions are 7x lower than the USA. Historical contribution is tiny. India cannot sacrifice development — 300 million+ people still in poverty. India is acting as fast as any developing country reasonably can. CONCLUSION: India is both a victim (most vulnerable) and a significant contributor (large absolute emissions). The CBDR framework accurately captures this complexity: India must act, but proportionally to its capability and responsibility, not to the same standard as countries with 5–7x higher per capita emissions.
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Last reviewed on 27 May 2026. Written and reviewed by subject-matter experts — read about our process.
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