This is the 12th post in Environmental Law, Unit V — having already studied the Kyoto Protocol (this unit's tenth post) as one of its offspring, this post goes back to examine the UNFCCC itself, the framework treaty from which both Kyoto and the Paris Agreement (covered next) derive their authority.
This unit's post on the Kyoto Protocol explained that a "framework convention" deliberately sets up institutions and principles without binding numerical targets, leaving those to be negotiated later. That description applies directly to the United Nations Framework Convention on Climate Change (UNFCCC) itself — the second of the two binding treaties opened for signature at the 1992 Rio Earth Summit, alongside the Convention on Biological Diversity covered earlier in this unit. Understanding the UNFCCC's own text and structure is necessary because both the Kyoto Protocol and the Paris Agreement are not free-standing treaties in their own right — they are legal instruments adopted under the UNFCCC's authority, by its Conference of the Parties, and both remain bound by the objective and principles the UNFCCC itself lays down.
The UNFCCC was adopted on 9 May 1992, opened for signature at the Rio Earth Summit in June 1992, and entered into force on 21 March 1994. Its objective, set out in Article 2, is to achieve stabilisation of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic (human-caused) interference with the climate system, within a time frame sufficient to allow ecosystems to adapt naturally to climate change, to ensure that food production is not threatened, and to enable economic development to proceed in a sustainable manner. Notice that this objective itself contains no number, no percentage, and no deadline — precisely the gap that Kyoto and later Paris were negotiated to fill.
Article 3 of the UNFCCC sets out the guiding principles that every later instrument adopted under it, including Kyoto and Paris, must remain consistent with. The most important is the principle of "common but differentiated responsibilities and respective capabilities" (CBDR-RC), under which developed country parties should take the lead in combating climate change and its adverse effects, in recognition of their historically greater contribution to global emissions and their generally greater financial and technological capacity. Article 3.3 also explicitly incorporates the precautionary principle into climate law: parties should take precautionary measures to anticipate, prevent, or minimise the causes of climate change, and the lack of full scientific certainty should not be used as a reason for postponing such measures where there are threats of serious or irreversible damage — language that echoes the precautionary principle already studied as a Glossary term in this subject's Unit III.
The UNFCCC classifies its parties into three categories relevant throughout this unit's later posts: Annex I parties (industrialised countries and economies in transition, on whom Kyoto later placed binding targets); Annex II parties (a subset of Annex I consisting of the wealthiest developed countries, who carry the additional obligation of providing financial resources and facilitating technology transfer to developing countries); and non-Annex I parties (developing countries, including India, with no binding emission-reduction obligations under either the Convention or Kyoto, though this changes under the Paris Agreement's different approach). The Convention's supreme governing body is its Conference of the Parties (COP), which meets annually and has produced the landmark instruments this unit studies — COP3 in Kyoto (1997) produced the Kyoto Protocol, and COP21 in Paris (2015), covered in this unit's final post, produced the Paris Agreement. The Convention's Secretariat is based in Bonn, Germany.
Suppose an exam question asks whether the Paris Agreement replaced the UNFCCC. The precise answer is no: the Paris Agreement was adopted under the UNFCCC's own Conference of the Parties (at COP21) and remains legally subordinate to and consistent with the UNFCCC's Article 2 objective and Article 3 principles, in exactly the same relationship the Kyoto Protocol had to the parent Convention. Recognising the UNFCCC as the constant legal foundation beneath both of its more famous offspring treaties is the key structural insight this post is meant to establish before this unit's final post on the Paris Agreement itself.