[pbhjpbhj]

There were reports last year, IIRC, of "sand shortages". Presumably a logistics infrastructure problem that could be relatively easily overcome?

[coryrc]

That's of "sharp sand".

Sand batteries don't need sharp sand.

[carlos_rpn]

I remember those reports.

I wonder if it has to be the same kind of sand, or could be some that we neither have another use for, nor would damage any ecosystem (too much).