STOCKHOLM, Dec. 11 (Xinhua) -- More than two months after the first Nord Stream gas leak was reported, methane levels are still elevated and may pose a threat to the ecosystem, researchers at a Swedish university said on Sunday.
Research has shown that "a significant part of the methane gas that leaked from the pipelines on the bottom of the Baltic Sea did not rise into the atmosphere. Instead, it dissolved in the water and spread with the currents," the University of Gothenburg said in a press release.
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