Common but differentiated responsibilities

Geography glossary

Also called: CBDR-RC · Topic: Climate Change: Causes, Evidence and the Global Response · NCERT: Beyond NCERT

Meaning

Common but differentiated responsibilities and respective capabilities (CBDR-RC) is a fairness principle in Article 3 of the UNFCCC (United Nations Framework Convention on Climate Change, the parent global treaty on climate change). It says all countries must act on climate change, but their duties are not equal. Developed countries must lead because they emitted most of the historical greenhouse gases. They must also help developing countries with money and technology, and each country acts according to its own wealth and technology.

It matters because it decides who must cut emissions, by how much, and who pays. It runs through the UNFCCC, the Kyoto Protocol and the Paris Agreement. It is also India's constant anchor in climate negotiations.

Explanation

Breaking down the name

Common: the climate is shared by everyone, so all countries must act.
Differentiated: the duties are not equal. Some countries must do more than others.
Respective capabilities: each country acts according to its own wealth and technology.
Where it sits: Article 3 of the UNFCCC.
Do not mix it up with Article 2, which sets the treaty's aim: to stabilise greenhouse gas concentrations (stop the amount of these gases in the air from rising) at a level that prevents dangerous human interference with the climate system.
Greenhouse gases (GHGs): gases such as carbon dioxide, methane and nitrous oxide. They trap outgoing heat and warm the Earth.

The reasoning, step by step

History of emissions:
Developed countries industrialised first.
So they emitted most of the historical GHGs that are in the air today.
Ability to pay:
They are also richer and have better technology.
Result:
They must lead in cutting emissions.
They must also support developing countries with finance and technology.

How the UNFCCC puts it into practice: the Annexes

Article 4 of the UNFCCC turns CBDR-RC into duties for different groups of countries.

All Parties: must report their emissions and take steps to act. (A Party is a country that has formally joined the treaty.)
Annex I: industrialised countries plus "economies in transition" (former Soviet-bloc countries moving to market economies). They must take the lead in cutting emissions.
Annex II: the richer part of Annex I (the OECD members of 1992). They must also provide finance and technology to developing countries.
Non-Annex I: developing countries, including India and China. They have no binding cut targets under the UNFCCC. They report and act with support.

How the principle has changed: Kyoto to Paris

Kyoto Protocol (1997), the "firewall" model:
A firewall here means a hard line between rich and poor countries.
Only Annex B countries (industrialised countries, almost the same list as Annex I) had legally binding targets.
Developing countries had no targets.
The model was top-down: the treaty itself set the targets.
Paris Agreement (2015), a softer model:
It kept CBDR-RC but added the words "in the light of different national circumstances".
Every country now sets its own target, called an NDC (Nationally Determined Contribution, its self-chosen climate pledge).
The model is bottom-up. Submitting an NDC is binding, but meeting the numbers is not.
Why it changed:
The Annex I/non-Annex I split of 1992 became dated as large developing emitters grew.
China and India had no Kyoto targets while their emissions grew fast.
So the countries actually bound by Kyoto covered a shrinking share of world emissions.

Where it occurs

UNFCCC, Article 3: text adopted in May 1992 and opened for signature in June 1992 at the Rio Earth Summit (UN Conference on Environment and Development, Rio de Janeiro, Brazil). It came into force on 21 March 1994. Its secretariat (the permanent office that runs the treaty) is in Bonn, Germany.
COP (Conference of the Parties): the yearly top meeting of all Parties, where the principle is negotiated. COP1 was held in Berlin, Germany, 1995.
Kyoto Protocol: adopted at COP3, Kyoto (Japan), December 1997; in force 16 February 2005. The strict version of the principle applied here: only Annex B countries had to cut emissions by an average of about 5% below 1990 levels during 2008–2012.
Clean Development Mechanism (CDM) in India: this was the "support" side of CBDR in action.
An Annex B country or company paid for a clean project in a developing country and earned carbon credits called Certified Emission Reductions (CERs).
India was among the largest CDM hosts in the world, with projects in renewable energy, energy efficiency, fuel switching, industrial processes and waste.
Doha Amendment: adopted at Doha, Qatar, on 8 December 2012. It kept the Kyoto firewall going for a second period, 2013–2020 [1].
Paris Agreement (2015): CBDR-RC "in the light of different national circumstances", with NDCs from all countries.
India: a non-Annex I country. It uses CBDR-RC with equity and climate justice as its core negotiating position.

Don't confuse with

Article 2 (objective) vs Article 3 (CBDR-RC): Article 2 gives the aim, which is to stabilise GHG concentrations, with no temperature or ppm number. Article 3 gives the fairness principle on how duties are shared.
Annex I vs Annex II: Annex I countries must lead in cutting emissions. Only Annex II countries must also give finance and technology. Every Annex II country is in Annex I, but not the reverse. Russia (a transition economy) is Annex I but not Annex II.
Kyoto's CBDR vs Paris's CBDR-RC: Kyoto used a strict firewall, so only rich countries were bound. Paris added "in the light of different national circumstances", and every country sets its own NDC.
Equity / climate justice vs CBDR-RC: these are separate ideas India pairs with CBDR-RC. Equity means fair shares of the remaining "carbon space" (how much more CO₂ the world can still emit). Climate justice means the poor did least to cause the problem but suffer most. CBDR-RC is the treaty principle in Article 3.

Prelims Hooks

CBDR-RC is in Article 3 of the UNFCCC. The objective (stabilise GHG concentrations) is in Article 2. Commitments by Annex are in Article 4.
Full form: Common But Differentiated Responsibilities and Respective Capabilities.
UNFCCC: opened at Rio, June 1992; in force 21 March 1994; secretariat in Bonn.
Trap: Annex II ⊂ Annex I. Only Annex II has the duty to provide finance and technology. India is non-Annex I, with no binding cut targets under the UNFCCC.
Kyoto (COP3, 1997; in force 16 Feb 2005) applied CBDR as a firewall. Binding targets were set only for Annex B countries, about 5% below 1990 in 2008–12.
Paris (2015) kept CBDR-RC but added "in the light of different national circumstances". All countries now submit NDCs.

Mains Points

CBDR-RC as India's anchor (GS-III):
Most historical emissions came from developed countries, and India's per-capita emissions are low.
So India asks for equity, climate justice, and finance and technology transfer from Annex II countries.
CDM showed how this support can work: India was among the largest hosts and gained clean-energy investment.
The principle under strain:
The 1992 Annex I/non-Annex I split is now dated, because large developing emitters have grown fast.
Under Kyoto, the USA never ratified, Canada withdrew in 2011, and China and India had no targets. So the countries actually bound covered a shrinking share of world emissions.
This pushed the world from Kyoto's top-down firewall to Paris's bottom-up NDCs, where CBDR-RC survives in a softer form.
Balancing fairness and action:
Paris now expects action from every country, so India has to defend differentiation by stressing historical responsibility and low per-capita emissions.
India also needs climate finance and technology to protect its people from climate impacts.

Related concepts

The international regime: UNFCCC, CBDR, Kyoto and the IPCC

Sources

1UNFCCC, Status of the Doha Amendmentunfccc.int · tier 2