#largest emitters

The world’s worst mega-leaks of the potent greenhouse gas methane in 2025 have been revealed by an analysis of satellite data. The super-polluting plumes from oil and gas facilities have a colossal heating impact on the climate but often result from poor maintenance and can be simple to fix. The assessment found dozens of mega-leaks, each having the same global heating impact as a coal-fired power station. The researchers said it was “maddening” that such easy action to fight the climate crisis was not being taken, and said people should be angry. Stopping the leaks can even be free, given that captured gas can be sold – methane is the “natural gas” that fires power stations. The mega-leaks occur across the world, but the top 25 list, produced by the Stop Methane Project at the University of California, Los Angeles (UCLA), is dominated by facilities in Turkmenistan. The scale of methane leaks in the secretive and authoritarian state has previously been described as “mind-boggling”. Super-polluting plumes were also seen in the US, the largest detected in 2025 occurring in Texas and leaking 5.5 tonnes of methane per hour, equivalent to running about a million fuel-guzzling SUVs. Venezuela (five) and Iran (three) also had multiple mega-leaks from state-owned facilities. The Stop Methane Project also analysed super-polluting plumes from landfill sites, where rotting organic waste can release huge volumes of methane when not well managed. The worst sites ranged across the world, from Turkey to Algeria and Malaysia to the US. Methane emissions cause 25% of global heating today, and there has been a “scary” surge since 2007, according to scientists. They have warned that this acceleration seriously risks triggering catastrophic climate tipping points. However, cutting methane emissions has a rapid impact, because the gas is naturally removed from the atmosphere far quicker than carbon dioxide. Some experts call cutting methane the climate “emergency brake”.

continue reading