Methane 'belch' theory gets boost
Scientists have found a series of vents in the Nordic Seas that may have burped enough methane to cause massive global warming 55 million years ago.
The early Eocene Period witnessed a dramatic increase in temperature, which was triggered by a sudden surge of greenhouse gases in the atmosphere.
But just where these gases came from has been something of a mystery.Nature magazine reports the discovery of gas vents dating from the right time and which could represent the source.
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