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dxdmyesterday at 9:29 PM1 replyview on HN

Water gets split into oxygen and hydrogen using energy. The hydrogen then gets burned to release usable energy, which creates water. At least as far as I remember from chemistry class ages ago.


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vardumptoday at 2:45 AM

There's some truth to what the gp said. Some hydrogen will escape, enter the upper atmosphere, and be blown away by the solar wind and thus be permanently lost.