Scientists uncovered evidence that a large earthquake in 1945 released more than seven million cubic metres of methane into the North Arabian Sea.
The discovery exposes a natural source of greenhouse gas emissions that has not been considered before, they claim.
As a greenhouse gas, methane is 20 times more potent than carbon dioxide, but less abundant in the atmosphere.
Enormous quantities of methane are locked in icy structures called hydrates on the floors of the continental shelves surrounding the Earth’s land masses.
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