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Paris Agreement

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The Paris Agreement is a major international treaty designed to address the global threat of climate change.

It focuses on three core areas: mitigation, adaptation, and finance. Mitigation involves reducing the greenhouse gas emissions that cause warming. Adaptation refers to adjusting to the changes already occurring in our environment. Finance involves mobilizing money to help countries meet these goals. This treaty is essential because it coordinates a global response to a problem that no single nation can solve alone.

The agreement operates through a unique "bottom-up" mechanism. Instead of an international body imposing strict targets on every nation, the treaty uses Nationally Determined Contributions, or NDCs. Each country determines, plans, and regularly reports on its own specific climate actions. While no mechanism forces a country to meet a specific target, the agreement requires that each new plan shows increased ambition over previous ones. This creates a cycle where countries are encouraged to strengthen their commitments over time.

Probability that countries achieve their Paris Agreement Goals according to their nationally determined contributions (NDCs)
Probability that countries achieve their Paris Agreement Goals according to their nationally determined contributions (NDCs)

This structure differs significantly from its predecessor, the 1997 Kyoto Protocol. The Kyoto Protocol only regulated emissions for a limited set of countries. In contrast, the Paris Agreement blurs the distinction between developed and developing nations. Now, both types of countries must submit plans for reducing their emissions. This shift was intended to create a more inclusive and comprehensive framework for all global emitters.

The Prime Minister, Shri Narendra Modi greeting the President of Brazil, Ms. Dilma Rousseff, during Group Photo Session, at COP21 Summit, in Paris, France on November 30, 2015
The Prime Minister, Shri Narendra Modi greeting the President of Brazil, Ms. Dilma Rousseff, during Group Photo Session, at COP21 Summit, in Paris, France on November 30, 2015

The path to Paris began with the 1992 United Nations Framework Convention on Climate Change (UNFCCC). This foundation led to various negotiations, including the 2009 Copenhagen Accord. While the Copenhagen talks failed to produce a universal treaty, they established the framework for the bottom-up approach used later. In 2015, leaders met at the COP21 conference near Paris, France.

GUSTAVO-CAMACHO-GONZALEZ-L1060274 (23430273715)
GUSTAVO-CAMACHO-GONZALEZ-L1060274 (23430273715)

Negotiations lasted two weeks and continued through three final nights. A major moment occurred when a legal dispute over the word "shall" versus "should" nearly caused the talks to fail. French negotiators resolved this by treating the word as a typographical error.

The treaty aims for very specific scientific goals regarding global temperature. The primary objective is to keep the rise in global surface temperature well below 2 degrees Celsius above pre-industrial levels. Ideally, leaders want to limit this increase to only 1.5 degrees Celsius.

IPCC 30y-centered-avg
IPCC 30y-centered-avg

To achieve the 1.5 degree goal, greenhouse gas emissions must be cut by roughly 50% by the year 2030. The long-term target is to reach net zero emissions by the middle of the 21st century.

Greenhouse gas emission scenarios 01
Greenhouse gas emission scenarios 01

Participation in the agreement has seen significant shifts in recent years. The treaty opened for signatures on April 22, 2016, which is Earth Day.

Secretary Kerry Holds Granddaughter Dobbs-Higginson on Lap While Signing COP21 Climate Change Agreement at UN General Assembly Hall in New York (26512345421)
Secretary Kerry Holds Granddaughter Dobbs-Higginson on Lap While Signing COP21 Climate Change Agreement at UN General Assembly Hall in New York (26512345421)

It entered into force on November 4, 2016, after the European Union ratified it. As of January 2026, 194 members of the UNFCCC are parties to the agreement. However, the United States has had a complicated history with the pact. The U.S. withdrew in 2020, rejoined in 2021, and withdrew again in 2026. Currently, Iran is the only major emitter that has not ratified the agreement.

While the agreement provides a vital framework, its effectiveness is a subject of intense debate. Some environmentalists and analysts criticize the treaty for not being strict enough. Global emissions have continued to rise rather than fall since the signing. In fact, 2024 was recorded as the hottest year, with temperatures rising more than 1.5 degrees Celsius. Despite these challenges, the agreement has been used successfully in climate litigation. This has forced some countries and oil companies to strengthen their climate actions. It remains a central tool for international climate policy and cooperation.

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File:Secretary Kerry Holds Granddaughter Dobbs-Higginson on Lap While Signing COP21 Climate Change Agreement at UN General Assembly Hall in New York (26512345421).jpg
Secretary Kerry Holds Granddaughter...
File:The Prime Minister, Shri Narendra Modi greeting the President of Brazil, Ms. Dilma Rousseff, during Group Photo Session, at COP21 Summit, in Paris, France on November 30, 2015.jpg
The Prime Minister, Shri Narendra Modi...
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File:Greenhouse gas emission scenarios 01.svg
Greenhouse gas emission scenarios 01.svg
File:Total CO2 by Region.svg
Total CO2 by Region.svg
File:Per Capita CO2 by Region.svg
Per Capita CO2 by Region.svg
File:GCF Signed Pledges 2018.svg
GCF Signed Pledges 2018.svg
File:IPCC 30y-centered-avg.png
IPCC 30y-centered-avg.png
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