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Key Facts In This Video
The Darvaza gas crater in Turkmenistan is nicknamed the "Door to Hell" because it has been burning since 1971. 00:14
The Door to Hell is a burning sinkhole of natural gas that measures more then 60 meters in diameter and 20 meters deep. 01:07
Methane is a greenhouse gas 20 times more potent than carbon dioxide. 01:43
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