NASA has discovered Arctic lakes bubbling with methane—and that's very bad news

Lakes across Alaska and Siberia have started to bubble with methane, and the release of this highly potent greenhouse gas has scientists worried. Last month NASA released footage showing the bubbling Arctic lakes, which are the result of a little known phenomenon called “abrupt thawing.” It occurs when the permafrost—ground that has been frozen for potentially thousands of years—thaws faster than expected.

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