For years, Turkmenistan ranked as the world’s worst country for methane mega-leaks — giant plumes of fossil gas escaping from corroded pipes, faulty wells, and failing flares across its ageing oil infrastructure. Now, new data from a UN monitoring system shows the country has sealed eight of those super-emitter leaks, a shift that climate scientists are calling a documented breakthrough in turning satellite surveillance into real-world action.
At a glance
- Methane super-emitters: A single super-emitter leak — defined as the escape of tons of methane per hour from one valve or pipeline — heats the planet more than the emissions from a million SUVs or an entire coal-fired power station.
- UN satellite alerts: The UN Methane Alert and Response System (MARS) sent 192 alerts of methane plumes to Turkmenistan in the last year; the country responded to about 20% with on-the-ground information and potential fix plans.
- Documented fixes: Eight leaks were stopped by repairing corroded pipes, faulty wells, and failing flares — with repairs spanning from November 2024 C.E. through at least March 2026 C.E.
Why methane leaks matter so much
Methane traps 80 times more heat than carbon dioxide, and scientists estimate it accounts for roughly 25% of global heating today. The upside: it also breaks down in the atmosphere far faster than CO2, which means plugging leaks produces rapid climate benefits. Some researchers call methane reduction the climate “emergency brake.”
Turkmenistan’s leaks were in a category of their own. In March 2023 C.E., reporting by The Guardian revealed the country had more super-emitting methane leaks than anywhere else on Earth. A follow-up investigation that May found that methane emissions from Turkmenistan’s two main fossil fuel fields caused more global heating in 2022 C.E. than the entire carbon emissions of the United Kingdom — a figure experts described as both “mind-boggling” and “infuriating.”
Sources in the capital, Ashgabat, later said that international scrutiny was the “critical step” in pushing the secretive, authoritarian government to engage with foreign partners. In December 2023 C.E., Turkmenistan joined the Global Methane Pledge, two years after it had launched.
How the fixes happened
The MARS system — part of the UN Environment Programme — uses artificial intelligence to analyze data from more than a dozen satellites. Potential leaks are then reviewed by two layers of human analysts before alerts go out to relevant governments or companies. A leak is only recorded as fixed once satellite data confirms emissions have stopped.
The first Turkmenistan repair came in November 2024 C.E., when a faulty well was sealed. The most recent, recorded in March 2026 C.E., involved fixing a corroded pipeline in Lebap province. In between, seven more leaks were addressed through targeted infrastructure work.
Meghan Demeter, MARS program manager, called the results a proof point. “These mitigation cases are a proof point of what can be done with satellite data, especially in situations like Turkmenistan, where there are a lot of detections,” she said. “We’re seeing that the pipeline of satellite data to mitigation action works, and it can work quite quickly.”
These eight sealed leaks are part of one of many climate progress milestones driven by improved monitoring and international pressure in recent years.
The bigger picture — and the gaps
MARS alerts have now led to 43 leaks being sealed globally. Kazakhstan, another former Soviet republic with ageing oil infrastructure, has also stopped eight leaks, though it received far fewer alerts — 38 over the last year compared to Turkmenistan’s 192. One major leak in Algeria, which had been running for nearly 40 years due to a faulty flare, has also been stemmed.
Mexico, Brazil, and Argentina all show 100% response rates to MARS alerts, though Mexico had not yet completed a fix on its worst active leak — an offshore plume releasing 37 metric tons of methane per hour, equivalent to the emissions of more than seven million SUVs.
The United States received the second-highest number of alerts — 138 — but responded to none and fixed no leaks in the last year. The previous Biden administration had engaged with MARS, and one small leak in New Mexico was fixed in 2024 C.E. after a pressure safety valve was repaired. That engagement ended with the return of the Trump administration. Iran, Russia, and China also failed to respond to any alerts.
UN Secretary-General António Guterres has called for all countries to respond to at least 80% of alerts. Turkmenistan’s current 20% rate leaves a long road ahead, and the country still had three of the six worst leaks detected worldwide in the last six months, with nine in the global top 50.
What comes next
Dan Grossman, vice-president at the Environmental Defense Fund, welcomed the news but set expectations clearly. “Turkmenistan and Kazakhstan are home to some of the world’s most significant methane hotspots and their response to satellite alerts is much-needed good news in the global effort to minimise methane pollution,” he said. “Alerts only matter if they lead to action, and governments and industry must do a better job.”
Demeter echoed that framing. “This is a breakthrough in terms of having real documented mitigation action,” she told The Guardian. “But it is not yet a breakthrough in the overall magnitude of emissions. Eight cases is an incredible first step, but there’s also a lot more sources in Turkmenistan that need to be addressed. We are in pretty constant communication and the response rate is growing month by month.”
MARS is scaling up technical support and knowledge-building alongside multiple partners, and Demeter noted growing requests for direct mitigation funding. Turkmenistan has vast natural gas reserves and is a major supplier to China — meaning the political and economic calculus around reform is complicated. Whether eight repairs becomes eighty remains the critical test. The UN Environment Programme’s methane monitoring work and tools like MARS represent a growing argument that transparency alone can shift behavior, even in countries that have long kept their fossil fuel operations opaque.
For context on how cleaner energy transitions are reshaping emissions globally, see coverage of how China’s CO2 emissions fell as clean energy surpassed fossil fuels, and how heat pumps outsold gas furnaces in the U.S. for a second straight year — two signals that the tools for rapid decarbonization are spreading.
Read more
For more on this story, see: The Guardian — Turkmenistan seals 8 massive methane leaks in climate “breakthrough”
For more from Good News for Humankind, see:
- Heat pumps outsell gas furnaces in the U.S. for a second straight year
- China’s CO2 emissions fall as clean energy surpasses fossil fuels
- The Good News for Humankind archive on climate change
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