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Tiny and unnoticeable though it may seem, sand is a critical ingredient of our lives. It is the primary raw material that modern cities are made from. The concr
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Tiny and unnoticeable though it may seem, sand is a critical ingredient of our lives. It is the primary raw material that modern cities are made from. The concrete needs it to construct shopping malls, offices, and apartment blocks;along with the asphalt, we use sand to build roads.
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