Nationally determined contribution

• 1. Introduction

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  Nationally determined contribution, or NDC, is the name for the promise every country files under the Paris Agreement to cut its own greenhouse gas emissions. Currently, under existing trends, the probability of staying below 2 degrees Celsius of warming sits at just 5 percent. If every country met its NDC and kept meeting it after 2030, that figure would climb to 26 percent. Those two numbers raise an obvious question. What exactly is a country promising when it files an NDC, and why isn't that promise enforceable by law? The Paris Agreement's long-term goal is to hold warming well below 2 degrees Celsius, and preferably to 1.5 degrees Celsius, above levels before industrialization. Reaching that goal depends entirely on documents that each country writes for itself, on a schedule, and revises over time. What that schedule looks like, how the promises are tracked, and how the whole system began are the threads this documentary follows.

• 2. The Bottom-Up Bargain

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  One description calls NDCs the piece that sits "at the heart of the Paris Agreement and the achievement of its long-term goals." Under the treaty, 195 Parties are required to prepare, communicate, and maintain their own NDCs, each one outlining what that country intends to achieve. Rather than a single global rulebook handed down from above, the process blends a top-down treaty structure with bottom-up input. Each nation sets its own goals based on national circumstances, capabilities, and priorities. Before 2015, these plans were called intended nationally determined contributions, or INDCs, and were voluntary, non-binding pledges. The pledges that replaced them, NDCs, carry more commitment but still are not legally binding either.

  After the initial round of INDCs arrived in March 2015, an assessment phase reviewed their combined impact ahead of the 2015 United Nations Climate Change Conference. Reports and reviews from individual parties, combined with a broader review called the "global stocktake," feed back into how each country shapes its next pledge. That feedback loop is meant to open room for domestic and international political pressure, pushing states toward more ambitious commitments over time. NDCs also mark a shift in the treaty's history. They are the first greenhouse gas targets under the UNFCCC that apply equally to developed and developing countries. That equal footing is enforced through a recurring cycle built to push every country's ambition higher over time.

• 3. The Five-Year Ratchet

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  Every NDC is registered with the UNFCCC Secretariat and is meant to be reset on a five-year cycle. That cycle is not simply a bureaucratic deadline. It sits inside a binding, iterative structure known as a "catalytic" framework, designed to ratchet up climate action over time rather than let ambition stall. Countries set their initial NDCs independently, whether as single nations or as regional groups. They are then bound to update those NDCs on that same five-year rhythm. Between full updates, biennial progress reports are published, tracking each country's progress against its own NDC targets. Those reports go through technical review before folding into a global stocktaking exercise. That exercise runs on its own five-year cycle, offset from the update cycle, and assesses the sufficiency of all NDCs combined. Outside that official process, other tools have begun tracking the same question country by country.

• 4. Tracking Progress

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  Three tools now track that question in public: the Climate Change Performance Index, the Climate Action Tracker, and the Climate Clock. Each lets anyone check online how close a country is running to its Paris Agreement commitments. Each tool offers only a general read on where a country stands. None break down how much each individual policy inside an NDC is expected to cut. The current wave of pledges, known as NDC 3.0, was due before the 2025 United Nations Climate Change Conference, and some countries have published theirs. These submissions set targets reaching out to 2035. Some arrive with extra material described as information for clarity, transparency, and understanding, meant to make the numbers easier to check.

  Officially, the deadline for that round was set for February 2025, but most countries missed it. As of the 25th of February 2026, 133 countries had filed a new NDC, most of them later than planned. The United Nations tracks that same completion rate through its Sustainable Development Goals. Goal 13 covers climate action, and its second target uses Indicator 13.2.1. It reads: "Number of countries with nationally determined contributions, long-term strategies, national adaptation plans, strategies as reported in adaptation communications and national communications." Counting submissions is one measure. Whether those submissions translate into real cuts is a separate, harder question.

• 5. Implementation Hurdles

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  As of 2021, emissions cuts would need to increase 80 percent beyond current NDC pledges. That jump is what it would take to likely hit the Paris Agreement's upper target of 2 degrees Celsius. Without that jump, the odds of the world's biggest emitters actually meeting their own existing NDCs are, by one assessment, very low. Reaching that jump requires more than better paperwork. Countries report struggling to build the political mandate needed to coordinate action around their NDCs and drive it through their own governments. Resource constraints compound the problem: many countries lack the funding and capacity to develop and carry out the climate policies their NDCs describe. These difficulties are not new. They echo challenges that go back to the earliest days of the pledge system, before it even had the name NDC.

• 6. The Road To Paris

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  In the early 1990s, international climate change negotiators were already discussing a "pledge and review" system, the direct forerunner of today's NDCs. That idea resurfaced formally in November 2013, at the United Nations Climate Change Conference in Warsaw, Poland. There, parties to the UNFCCC were asked to publish what were then called intended nationally determined contributions, or INDCs. Those intended contributions were framed "without prejudice to the legal nature" of the pledges themselves, leaving the question of enforceability open. The term itself was a compromise between two older labels the Kyoto Protocol had used. One was "quantified emissions limitation and reduction objective," applied to developed countries. The other was "Nationally Appropriate Mitigation Actions," applied to developing ones. After the Paris Agreement entered into force in 2016, each country's INDC automatically became its first NDC once that country ratified the treaty. The only exception was a country that chose to submit a fresh NDC at the same time. The first country to actually test this new label would file its INDC within weeks of that framing being settled.

• 7. The First Filings

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  On the 27th of February 2015, Switzerland became the first nation to submit its INDC. Switzerland reported that it had already seen a temperature rise of 1.75 degrees Celsius since 1864. It pledged to cut its own greenhouse gas emissions 50 percent by 2030. India followed in October 2015, submitting its own INDC. It committed to cutting the emissions intensity of its GDP by 33-35 percent by 2030, measured against 2005 levels. India also wrote that it would need "at least USD 2.5 trillion" to meet its goals for the 2015-2030 period. It described its "international climate finance needs" as the gap between the total requirement and what could be made available from domestic sources. Among all countries surveyed on the process, 85 percent said the short time frame for developing an INDC was itself a challenge. Others cited trouble securing high-level political support, unclear guidance on what an INDC should contain, and limited technical expertise for judging their own options. Less than a quarter of countries said they had received international support to prepare their submissions. More than a quarter were still applying for it. One assessment of the INDC process concluded there is no "one-size-fits-all" approach or methodology, since the obstacles differ for every country. That same absence of a single template carries into every round of pledges that has followed since.