• FishFace@piefed.social
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    4 days ago

    How does that compare to the quantity of sand already in existence? There was a long period of time (millions and millions of years) when there were no parrotfish, but billions of tons of calcium carbonate being eroded by the weather.

    • can@sh.itjust.works
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      3 days ago

      How much of all the planet’s sand is on beaches frequenteeed by humans? Perhaps the interesting samples are over-represented but they’re still neat.

    • mnemonicmonkeys@sh.itjust.works
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      4 days ago

      How does that compare to the quantity of sand already in existence?

      Seeing as there’s now a shortage of water-eroded sand, probably a good portion of it

      • FishFace@piefed.social
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        4 days ago

        Are you thinking of sand that’s easily accessible (so not under many metres of sea) and suitable for use in concrete?