COP21 was the 21st Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC). It was held in Paris, France, in 2015.
COP21 is one of the most important climate summits in history because it resulted in the adoption of the Paris Agreement, a legally binding international treaty on climate change.
Paris Agreement
The Paris Agreement was adopted on 12 December 2015 and entered into force on 4 November 2016.
Its central aim is to limit global warming to:
- well below 2°C above pre-industrial levels
- while pursuing efforts to limit warming to 1.5°C
This 1.5°C target became especially important for small island states, coastal countries, drought-prone regions and climate-vulnerable communities.
The Paris Agreement applies to all countries, unlike the Kyoto Protocol, which placed binding emission reduction targets mainly on developed countries.
Nationally Determined Contributions
A key feature of the Paris Agreement is the system of Nationally Determined Contributions (NDCs).
NDCs are climate action plans submitted by countries. Each country decides its own targets based on national circumstances, development needs and capabilities.
NDCs may include:
- emission reduction targets
- renewable energy goals
- energy efficiency measures
- forest and carbon sink targets
- adaptation actions
- climate finance needs
- technology requirements
Countries are expected to update and strengthen their NDCs every five years.
Key Principles
COP21 retained the principle of Common but Differentiated Responsibilities and Respective Capabilities.
This means all countries must act against climate change, but developed countries have greater responsibility because of their historical emissions and higher financial and technological capacity.
The Paris Agreement also recognised the need for climate finance, adaptation support and technology transfer for developing countries.
Important elements include:
- mitigation
- adaptation
- climate finance
- technology transfer
- capacity building
- transparency framework
- global stocktake
- loss and damage recognition
Global Stocktake and Transparency
The Paris Agreement created a system of periodic review called the Global Stocktake.
The Global Stocktake assesses collective progress towards achieving the long-term goals of the Paris Agreement.
It takes place every five years.
The agreement also created an enhanced transparency framework, under which countries report their emissions, climate actions and progress towards their NDCs.
This system is important because the Paris Agreement depends heavily on trust, reporting and periodic strengthening of commitments.
Significance
COP21 was significant because it shifted global climate governance from a top-down model to a flexible, country-driven model.
Under the Kyoto Protocol, only developed countries had binding emission targets. Under the Paris Agreement, all countries submit climate commitments, though responsibilities remain differentiated.
Its importance lies in:
- universal participation
- recognition of 1.5°C goal
- NDC-based climate action
- stronger adaptation focus
- climate finance commitment
- transparency and review mechanism
- long-term net-zero direction
COP21 also changed climate diplomacy by bringing together developed and developing countries under one common framework.
India’s Position
India supported the Paris Agreement while emphasising climate justice and equity.
India argued that developing countries need policy space for poverty reduction, energy access, industrialisation and development.
India’s climate approach under the Paris framework includes:
- expansion of renewable energy
- reduction in emissions intensity of GDP
- creation of additional carbon sink through forests
- promotion of sustainable lifestyles
- climate finance and technology transfer demands
- protection of development space
India later updated its NDCs and also announced the target of achieving net zero by 2070.
Concerns
The Paris Agreement is legally binding as a treaty, but the specific emission targets under NDCs are nationally determined and not enforced like strict penalties.
This creates concern that countries may submit weak targets or fail to implement them fully.
Other concerns include:
- inadequate climate finance
- slow emission reduction by major economies
- weak delivery on adaptation support
- rising climate losses in vulnerable countries
- gap between current pledges and 1.5°C pathway
- dependence on voluntary ambition
The main challenge is implementation. The Paris Agreement created the framework, but actual success depends on stronger national action.
Conclusion
COP21, held in Paris in 2015, produced the historic Paris Agreement.
Its importance lies in creating a universal climate framework based on NDCs, global stocktake, transparency, climate finance and the goal of limiting warming to well below 2°C while pursuing 1.5°C.
For India and other developing countries, COP21 remains important because it combines climate action with the principles of equity, climate justice and differentiated responsibilities.
