Paris Agreement adopted at COP21

On 12 December 2015, at Le Bourget, the Conference of the Parties to the United Nations Framework Convention on Climate Change, at its twenty-first session (COP21), adopted the Paris Agreement. The act is decision 1/CP.21, “Adoption of the Paris Agreement,” in the COP report addendum FCCC/CP/2015/10/Add.1 (https://unfccc.int/resource/docs/2015/cop21/eng/10a01.pdf (opens in a new tab)). The authentic annex is the treaty text. The UNFCCC souvenir edition of that same decision states that the Conference of the Parties adopted the Agreement on 12 December 2015 (https://unfccc.int/sites/default/files/resource/parisagreement_publication.pdf (opens in a new tab)). Laurent Fabius, as COP President and French foreign minister, put the decision to the hall and gavelled it. François Hollande hosted. Ban Ki-moon was United Nations Secretary-General. Those three names stay plain text here.

The temperature aim is in Article 2. Parties agreed to hold the increase in the global average temperature to well below 2 °C above pre-industrial levels and to pursue efforts to limit the increase to 1.5 °C. Article 4 records nationally determined contributions, not a negotiated emissions cap. Article 21 records the entry-into-force rule: the thirtieth day after at least 55 Parties accounting in total for at least an estimated 55 percent of global greenhouse-gas emissions have deposited instruments. Signature opened in New York on 22 April 2016.

This Fact is the adoption. It is not a first-day emissions print, not a unique GtCO2, and not a later withdrawal or rejoin.

Context

COP21 sat from 30 November to 13 December 2015 under the Durban Platform (decision 1/CP.17). Copenhagen in 2009 had closed without a comparable treaty. The Kyoto Protocol’s second commitment period did not cover the largest emitters as a complete cap. Paris replaced that sequencing with a contribution cycle for all Parties, with common but differentiated responsibilities and respective capabilities, in the light of different national circumstances.

Leaders spoke at the opening, not at the gavel. On 30 November 2015 Xi Jinping addressed the leaders’ segment; China’s nationally determined contribution, including a stated intent to peak carbon dioxide emissions around 2030, was already on the table. That speech is not the 12 December decision. Frans Timmermans sat as Netherlands Minister of Foreign Affairs. He was not COP President and not the later European Commission Executive Vice-President for the European Green Deal; Fit for 55 is a later EU statute wave. António Guterres was not Secretary-General on 12 December 2015. He took that office on 1 January 2017 and later treated Paris as the UN climate framework.

The decision text also recorded a climate-finance neighbourhood, including the existing developed-country goal of mobilising USD 100 billion a year by 2020, and a five-year stocktake cycle. Those paragraphs are part of 1/CP.21. They are not a measured transfer on 12 December, and they are not a unique dollar size stored here.

Paris is the legal architecture that later NDCs, inventories, and global stocktakes sit under. It is not pace of climate transition, not climate-finance availability, not decarbonization policy, and not climate crisis. It is not ukraine-war and not territorial-revisionism (1918–45).

Why it matters

In Factrail terms this is a recorded multilateral act: a COP decision adopting a treaty. No Person on this page is stored as the sole author of 196 Parties. Xi Jinping is a referenced opening-week head of state whose nationally determined contribution was part of the bargain, not the gavel. Frans Timmermans is a referenced foreign minister of one Party. António Guterres is a referenced later Secretary-General. Ban Ki-moon, Laurent Fabius, and François Hollande remain unresolved names in prose.

The impact path treats adoption as initiating legal architecture that can later weaken intensity if nationally determined contributions, inventories, and stocktakes actually move the emissions tables. That is a hypothesis of stated medium confidence, not a measured bridge on 12 December 2015. A pledge cycle is not a cap. If global intensity later falls, the evidence will be the named inventory tables, not this gavel. If intensity rises, the gavel is not a rebate.

This page does not invent Contribution.size and does not invent a unique GtCO2. Contested 2015 NDC-gap figures stay on UNEP Emissions Gap and UNFCCC synthesis instruments.