UNFCCC, Kyoto Protocol and Paris Agreement

A recurring trap on this chapter is treating the Kyoto Protocol and the Paris Agreement as interchangeable "climate treaties." They are built on opposite logics. Kyoto set legally binding, individually negotiated emission-reduction targets for a fixed list of developed (Annex I) countries only. Paris is itself a binding treaty, but the targets inside it, the Nationally Determined Contributions (NDCs), are self-decided by each country and not internationally imposed numbers, and Paris binds developing and developed countries alike into one framework. A question asking which treaty carries "binding targets," or which one covers "all countries," is really testing whether you know this one structural difference.

The sibling note "India's Climate Finance and International Cooperation" covers COP28's Global Stocktake outcome, the climate finance target's evolution from $100 billion to the $300 billion NCQG, India's CBDR-RC negotiating position, and coalitions like the CCAC and TEEB. This note covers the foundational treaty architecture instead: the UNFCCC, the Kyoto Protocol's mechanisms, the Paris Agreement's structure, and REDD+.

The UNFCCC

The United Nations Framework Convention on Climate Change (UNFCCC) was adopted at UN Headquarters, New York, on 9 May 1992, and opened for signature at the Rio Earth Summit (Rio de Janeiro, 3-14 June 1992). It entered into force on 21 March 1994, once the 50th instrument of ratification was deposited. Today it has near-universal membership: 198 Parties (197 states plus the European Union as a regional economic integration organisation).

The Convention's ultimate objective is to stabilise greenhouse gas concentrations "at a level that would prevent dangerous anthropogenic interference with the climate system," within a timeframe that lets ecosystems adapt naturally, protects food production, and allows sustainable economic development.

The UNFCCC splits countries into two groups that later treaties build on: Annex I countries (OECD members plus 12 Central and Eastern European "economies in transition"), who were expected to cut emissions to 1990 levels by the year 2000, and Non-Annex I countries (developing countries, including India), who face no such target under the Convention itself. Industrialised countries also committed to fund climate action in developing countries beyond their existing aid, through a financial mechanism managed by the Global Environment Facility (GEF), and to share technology.

The UNFCCC is one of three Rio Conventions signed at the same 1992 summit, alongside the UN Convention on Biological Diversity and the UN Convention to Combat Desertification. Its Secretariat is based in Bonn, Germany, and its supreme decision-making body is the Conference of the Parties (COP), which has met annually since 1995 (COP1, Berlin).

The Kyoto Protocol's mechanisms

The Kyoto Protocol was adopted on 11 December 1997 at COP3 in Kyoto, Japan. Because of a slow ratification process it only entered into force on 16 February 2005; it now has 192 Parties. It operationalises the UNFCCC by attaching binding, numerically specific emission targets to the Convention's Annex I list, renamed Annex B in the Protocol's own annex. Crucially, the Protocol binds only these industrialised countries and economies in transition; developing countries carry no binding target under Kyoto at all.

In the first commitment period (2008-2012), Annex B targets for 37 industrialised countries and the European Union added up to an average 5% cut in emissions below 1990 levels. The Doha Amendment, adopted on 8 December 2012 (entering into force only on 31 December 2020, once enough countries had ratified it), created a second commitment period (2013-2020) with a collective target of at least 18% below 1990 levels, though the group of participating countries had changed by then.

To help countries meet these binding targets cost-effectively, Kyoto created three market-based mechanisms, all trading in units each equal to one tonne of CO2:

• Clean Development Mechanism (CDM), Article 12: lets an Annex B (developed) country fund an emission-reduction project in a developing (non-Annex I) country and earn Certified Emission Reductions (CERs), countable towards its own Kyoto target. It has been operational since 2006, and by the end of the first commitment period had registered over 1,650 projects expected to generate more than 2.9 billion tonnes of CO2-equivalent CERs. Projects need approval from a host country's Designated National Authority and oversight from the CDM Executive Board.
• Joint Implementation (JI), Article 6: lets one Annex B country earn Emission Reduction Units (ERUs) from a project hosted in another Annex B country, so unlike CDM it moves credits between two developed/transition economies, not from developed to developing. It runs on a Track 1 (host-verified) or Track 2 (independently verified by the Joint Implementation Supervisory Committee) procedure.
• Emissions Trading (ET), Article 17: lets an Annex B country with spare allowance, its Assigned Amount Units (AAUs), sell that surplus directly to a country exceeding its target, the origin of the international "carbon market." Removal Units (RMUs, from land use and forestry) and JI/CDM credits can also be traded this way. Each country must keep a "commitment period reserve" so it cannot oversell past a safe floor.

The exam-safe way to tell the three apart: CDM moves credits from developed to developing countries, JI moves credits between developed countries, and ET simply trades existing allowances among developed countries without a project underneath the trade.

The Paris Agreement

The Paris Agreement was adopted by 195 Parties at COP21 on 12 December 2015 and entered into force on 4 November 2016; it now has 194 Parties. It is a legally binding international treaty, and it is a landmark precisely because, for the first time, it brings all nations, developed and developing, into one binding framework rather than exempting developing countries the way Kyoto did.

What is not binding, and this is the chapter's most tested distinction, is the content of each country's target. Paris works through Nationally Determined Contributions (NDCs): each country decides its own emission-reduction and adaptation commitments and submits them itself, rather than having a number negotiated and imposed on it the way Annex B targets were under Kyoto. NDCs are submitted and updated on a five-year cycle, each round meant to be more ambitious than the last, a design known as the ratchet mechanism.

The Agreement's temperature goal is to hold the rise in global average temperature well below 2 degrees Celsius above pre-industrial levels, while pursuing efforts to cap it at 1.5 degrees Celsius. Countries can also submit voluntary Long-Term Strategies (LT-LEDS), low-emission development plans that frame their NDCs but, unlike the NDCs themselves, are not mandatory. Progress is tracked through an Enhanced Transparency Framework (ETF), under which reporting on actions and support began in 2024, feeding into a periodic Global Stocktake that assesses collective progress and informs the next round of NDCs (COP28 produced the first such Stocktake outcome, covered in the sibling note).

REDD+ and forest-based mitigation

REDD+ stands for Reducing Emissions from Deforestation and Forest Degradation in developing countries, with the "+" covering conservation, sustainable management of forests, and enhancement of forest carbon stocks. The concept entered UNFCCC negotiations at COP13 in Bali (2007), through the Bali Action Plan and an accompanying decision on reducing emissions from deforestation. It was built into a complete rule set, the Warsaw Framework for REDD+, at COP19 in Warsaw (December 2013), which supplies the methodology and results-based financing guidance still used today. REDD+ is also recognised in Article 5 of the Paris Agreement (2015), which reaffirms it as an integral element of the Agreement.

REDD+ pays countries for results, not intentions. Implementation moves through three phases: a readiness phase (national strategies, policy design, capacity-building), an implementation phase (rolling out those policies, including demonstration activities), and a results-based phase, where emission reductions are measured, reported and verified (MRV) before a country becomes eligible for results-based payments.

A distinct but easily confused body is the UN-REDD Programme, launched in 2008 by then UN Secretary-General Ban Ki-moon as a joint initiative of FAO, UNDP and UNEP. UN-REDD is the technical and advisory support vehicle that helps countries build REDD+ readiness (monitoring systems, governance capacity, and so on); it is not itself the negotiated REDD+ mechanism, which sits under the UNFCCC and the Warsaw Framework. Confusing "REDD+" (the UNFCCC framework, Bali 2007 onward) with "UN-REDD" (the FAO/UNDP/UNEP support programme, 2008) is a common trap.

Exam angle

Four traps recur across this chapter's PYQs. First, and most tested: do not let "climate treaty" blur Kyoto's binding, developed-country-only targets into Paris's non-binding, universal NDC model, they sit at opposite ends of the binding/non-binding spectrum. Second, keep the three Kyoto mechanisms straight by who trades with whom: CDM is developed-to-developing, JI is developed-to-developed, and ET is pure allowance trading with no project attached. Third, do not equate REDD+ (the UNFCCC's negotiated forest framework, dating to Bali 2007 and formalised at Warsaw in 2013) with the UN-REDD Programme (a specific FAO/UNDP/UNEP support initiative from 2008); a question can name either one and expect you to know it is not the other. Fourth, watch the dates: UNFCCC (1992, force 1994), Kyoto (1997, force 2005), Paris (2015, force 2016), each pair of adoption and entry-into-force years is a plausible distractor on its own.

Quick revision points

• UNFCCC: adopted 9 May 1992, opened at the Rio Earth Summit, in force 21 March 1994, 198 Parties. Objective: stabilise GHG concentrations to prevent dangerous anthropogenic interference.
• Kyoto Protocol: adopted 11 December 1997 (COP3), in force 16 February 2005, 192 Parties. Binds Annex B (developed) countries only. First commitment period (2008-2012): average 5% cut below 1990 levels. Doha Amendment second period (2013-2020): at least 18% below 1990 levels.
• Kyoto's three mechanisms: CDM (Article 12, developed-to-developing, earns CERs), JI (Article 6, developed-to-developed, earns ERUs), ET (Article 17, trades AAUs, the carbon market).
• Paris Agreement: adopted 12 December 2015 (COP21), in force 4 November 2016, 194 Parties. Binding treaty, non-binding NDC targets, five-year ratchet cycle, goal of well below 2 degrees Celsius, pursuing 1.5 degrees Celsius.
• REDD+: Bali Action Plan (COP13, 2007) origin, Warsaw Framework for REDD+ (COP19, 2013), recognised in Paris Agreement Article 5. Three phases: readiness, implementation, results-based payments.
• UN-REDD Programme: launched 2008, FAO/UNDP/UNEP, a support programme for REDD+ readiness, not the REDD+ framework itself.

Try a few practice questions on this chapter to see how these dates and mechanisms get tested against each other.