By Matt McGrath
- Environment correspondent
26 February 2016
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Image copyright
Getty Images
Image caption
The site of the massive natural gas leak near Los Angeles
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A scientific analysis of a natural gas leak near Los Angeles says that it was the biggest in US history.
The Aliso Canyon blowout vented almost 100,000 tonnes of methane into the atmosphere before it was plugged.
The impact on the climate is said to be the equivalent of the annual emissions of half a million cars.
Researchers say it had a far bigger warming effect than the BP oil spill in the Gulf of Mexico in 2010. MORE
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