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Methane hydrate under ice, Lake Baikal
Methane hydrate under ice, Lake Baikal, Russia. This large freshwater lake produces a natural source of methane hydrate (also known as methane clathrate, hydromethane and methane ice.) It is formed when methane, produced by microorganisms at the bottom of the lake, becomes trapped in water molecules under the high pressure and low temperature conditions of the lake bed. The resulting opaque, ice-like solid methane hydrate (circular white objects in image) offers a potentially vast untapped form of fossil fuel energy.
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