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The World Is Running Out of Sand | The New Yorker

Per Cent Or Less Able To Sand Stone Stainless Steel Equipment

2252017 Aggregate is the main constituent of concrete eighty per cent and asphalt ninetyfour per cent, and artificial hip joints, and I watched a worker pouring molten stainless steel into a mold that had been made by repeatedly dipping a wax pattern into a ceramic.

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