Throughout 2025, UNEP supported countries, cities and other partners to address greenhouse gas emissions. 

Using satellite observations, UNEP’s International Methane Emissions Observatory detected methane leaks from oil and gas installations in 36 countries. Alerts to governments led to the repair of at least 19 leaks, which combined had been pumping out 1,200 tonnes of methane every 24 hours. 

In 2025, 14 additional oil and gas companies joined the UNEP-led Oil and Gas Methane Partnership, which assists firms to measure and reduce their methane emissions. More than 150 companies with assets in 90-plus countries – representing 42 per cent of oil and gas production – now belong to the partnership. 

With support from the UNEP-convened Climate and Clean Air Coalition (CCAC), 35 nations developed roadmaps for reducing methane emissions, and 25 countries integrated methane reduction targets into the latest round of their national climate pledges. The CCAC also supported nations as they pursued their commitments under the Global Methane Pledge, an international push to reduce emissions by 30 per cent by 2030 from 2020 levels. 

UNEP supported 17 nations, some among the world’s Least Developed Countries, as they created concrete plans for using technology to counter climate change. The work became a pillar of Yemen’s national climate change strategy and allowed Ghana to secure US$70 million in financing, which is expected to benefit 3.6 million people. 

UNEP also leveraged digital technology, working with partners to make power systems more efficient in four countries. In Brazil, some residents saw their electricity bills drop up to 70 per cent. Meanwhile, in Bogotá, Colombia, and New Delhi, India, the interventions helped reduce energy use and prevent blackouts. The effort improved the lives of 340,000 people. 

UNEP advised Brazil on the development of a national plan to achieve its climate change–related targets. The strategy will guide public policy and investment in the country. UNEP also provided technical guidance to Chile as it implemented a framework national climate change law designed to make the country carbon-neutral by 2050, part of a broader ecological transition plan.