Arctic Sinkholes I Full Documentary I NOVA I PBS
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Arctic Sinkholes I Full Documentary I NOVA I PBS
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate. Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive sinkholes. In Alaska, a huge lake erupts with bubbles of inflammable gas. Scientists are discovering that these mystifying phenomena add up to a ticking time bomb ...
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