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European Union countries passed a law to impose limits on methane emissions in oil and gas imports from 2030, putting pressure on international suppliers to reduce greenhouse gas emissions.
Methane is the main component of burning natural gas from places in power plants and for heating homes. It is also the second largest cause of climate change after carbon dioxide and promotes global warming when released into the atmosphere.
From 2030, the EU will set "maximum methane intensity values" for fossil fuels. The European Commission will determine the exact methane limits by that date. Oil and gas importers who breach the border can face financial penalties.
The import rules could affect major gas suppliers such as the US, Algeria and Russia. Moscow cut supplies to Europe since its invasion of Ukraine in 2022 and has since been replaced as Europe's biggest gas supplier by Norway, whose supply has the lowest methane intensity in the world.
The Biden administration, which along with the EU has rallied countries to cut methane emissions by 30% by 2030 to limit climate change, has welcomed the EU law. The US last year imposed its own rules requiring oil firms to limit their methane emissions.
From 2027, the EU will also require that new import contracts for oil, gas and coal can only be signed with foreign producers that follow methane emissions reporting rules equivalent to those of the EU.