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I wonder if there are any research towards adapting desert sand for use in concrete? It would solve this "problem" in a jiffy.

With the size of the construction industry and the matching need for sand, I can't imagine this being an avenue left unexplored.

Desert sand is rounded, river sand is spiky.

I've wondered if we could melt the desert sand into glass and use machines to get it back down to the right coarseness.

It's one of the ways I think widely available & cheap renewable energy would help solve most of the worlds resource shortages