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There are also bacteria which metabolise hydrogen and ammonia and others which live in the cooling pools and pressure vessels of nuclear reactors. I also know of bacteria which metabolise heavy metals...they're quite common in active garbage tips, old reclaimed dumps and mines. Sulphur metabolising bacteria are very common around underwater volcanic vents and in boiling mud pools, hot springs and the like. In actual fact, they help stabilise and form various types of ore deposits, especially the volcanogenic, sediment hosted deposits.
Life is a very tenacious thing and is far more widespread than many even realise.
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