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[–] 22 points 1 day ago (6 children)

Water is not eternal. It can be destroyed and created. One of the interesting ways new water happens is when you burn hydrocarbons. Some of those hydrogen atoms find and bond to the oxygen from the air and boom, that's brand new water; clean and pure, straight from the exhaust pipe.

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  • [–] 16 points 1 day ago (4 children)

    Yep! The idea that a water molecule has always been on Earth is a really widespread notion.

    You won't believe your eyes! WATCH as photosynthesis DESTROYS water!

    6CO2 + 6H2O + light energy → C6H12O6 + 6O2

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  • [–] 4 points 1 day ago (3 children)

    Yeah but how often is that happening to the entire volume of the ocean?

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  • [–] 8 points 1 day ago (2 children)

    Apparently all water molecules on earth are recycled through life roughly every 2 to 5 million years.

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