13. COP21 and the Paris Agreement, 2016 | A New, Universal Approach to Climate Change

This is the 13th and final post in Environmental Law, Unit V — this post covers the Paris Agreement, the instrument that succeeded the Kyoto Protocol (this unit's tenth post) by abandoning its rigid developed/developing binary in favour of a universal, self-determined approach.

The Problem This Topic Solves

This unit's post on the Kyoto Protocol identified its central weakness: because binding targets applied only to Annex I developed countries, the United States never ratified it, Canada withdrew in 2011, and fast-growing emitters among developing countries — including China, which became the world's largest annual emitter during the Kyoto era — carried no binding obligation at all. By the time Kyoto's second commitment period was expiring around 2020, it had become clear that any successor needed to bring every major emitter, developed and developing alike, into a single framework, without repeating the top-down, internationally-negotiated-target structure that had made Kyoto politically fragile in the first place.

COP21 and Adoption

The 21st Conference of the Parties to the UNFCCC (COP21) was held in Paris, France, from 30 November to 12 December 2015, and the Paris Agreement was adopted by consensus on 12 December 2015. It was opened for signature on 22 April 2016 (Earth Day) at UN Headquarters in New York, and entered into force on 4 November 2016 — meeting its double threshold (ratification by at least 55 parties, together accounting for at least 55% of global greenhouse gas emissions) faster than almost any other major multilateral environmental treaty in history, a strong signal of the political momentum behind it.

The Core Departure — Nationally Determined Contributions

Unlike Kyoto's internationally negotiated, top-down targets imposed only on Annex I countries, the Paris Agreement adopts a bottom-up structure built around "Nationally Determined Contributions" (NDCs) — each country, developed or developing, sets its own emissions target according to its own national circumstances and capabilities, rather than having a number negotiated for it by others. This is what makes Paris a genuinely universal agreement: virtually every UN member State has submitted an NDC, something Kyoto never achieved. The Agreement's overarching temperature goal is to hold the increase in global average temperature to well below 2°C above pre-industrial levels, and to pursue efforts to limit the increase to 1.5°C, recognising that this would significantly reduce the risks and impacts of climate change. NDCs must be submitted and then strengthened every five years under a "ratchet mechanism", accompanied by a periodic "Global Stocktake" assessing collective progress toward the temperature goal — the first Global Stocktake concluded at COP28 in Dubai in December 2023.

A Trade-Off — Universal Participation, Weaker Enforcement

The Paris Agreement's design involves a deliberate trade-off compared to Kyoto. While the procedural obligations under Paris are legally binding — every party must submit an NDC, report on its progress transparently, and participate in the Global Stocktake — the substantive content of each country's NDC is not internationally binding, and there is no penalty mechanism for a country that falls short of its own stated target, unlike the compliance system Kyoto had built for Annex I countries. Developed countries also reaffirmed an earlier pledge (first made at COP15, Copenhagen, in 2009) to jointly mobilise US $100 billion per year by 2020 in climate finance to support developing countries' mitigation and adaptation efforts, an ongoing and often contested element of the regime's implementation.

India and the Paris Agreement

India ratified the Paris Agreement on 2 October 2016 — deliberately chosen to coincide with Gandhi Jayanti. India's updated NDC, submitted in 2022, targets reducing the emissions intensity of its GDP by 45% by 2030 from 2005 levels, achieving about 50% of its cumulative installed electric power capacity from non-fossil-fuel sources by 2030, and creating an additional carbon sink of 2.5 to 3 billion tonnes of CO2 equivalent through additional forest and tree cover by 2030. At COP26 in Glasgow in November 2021, India's Prime Minister announced a longer-term national target of achieving net-zero emissions by 2070. The Agreement's political durability has also been tested repeatedly by the United States, which announced withdrawal under one administration in 2017 (taking formal effect in November 2020), rejoined under the next administration in February 2021, and, following the change of administration effective January 2025, again initiated the one-year withdrawal process, illustrating how, even under the Paris Agreement's more universal design, the participation of any single major emitter can remain politically unstable in a way its own architecture cannot fully guarantee against.

• Paris Agreement: adopted 12 December 2015 (COP21, Paris); opened for signature 22 April 2016; in force 4 November 2016.
• Departs from Kyoto's top-down Annex I/non-Annex I binary by using bottom-up, self-set "Nationally Determined Contributions" (NDCs) from every party — a universal agreement.
• Temperature goal: hold warming well below 2°C above pre-industrial levels, pursuing efforts to limit it to 1.5°C.

• NDCs must be strengthened every 5 years (ratchet mechanism); a periodic Global Stocktake reviews collective progress (first concluded at COP28, Dubai, December 2023).
• Procedural obligations (submitting NDCs, reporting) are binding; the substantive content of each NDC is not internationally binding, and there is no penalty for missing it — a deliberate trade-off for universal participation.
• India ratified on 2 October 2016; its updated NDC (2022) targets a 45% cut in emissions intensity by 2030 (from 2005 levels) and about 50% non-fossil electric capacity by 2030; India announced a net-zero-by-2070 target at COP26 (2021).

A Practical Example

Suppose an exam question asks why India had no binding obligations under Kyoto but does have obligations under Paris. The answer lies in the structural shift this post describes: Kyoto's Annex I/non-Annex I binary placed no binding target on India as a non-Annex I developing country, while Paris requires every party, India included, to submit and periodically strengthen its own Nationally Determined Contribution — though critically, India (like every other party) sets the content of that NDC itself, rather than having a number imposed by international negotiation, which is precisely the feature that made near-universal participation possible where Kyoto had failed.

Quick Revision Points

• Paris Agreement: COP21, Paris; adopted 12 December 2015; in force 4 November 2016.
• Bottom-up NDCs from every party (universal) replace Kyoto's top-down Annex I-only targets.
• Temperature goal: well below 2°C, pursuing 1.5°C; 5-year NDC ratchet mechanism; periodic Global Stocktake.
• Binding procedure, non-binding NDC content, no penalty mechanism — trade-off for universality.
• India: ratified 2 October 2016; 2022 NDC (45% emissions-intensity cut by 2030); net-zero by 2070 (announced COP26, 2021).