> there's a shortage of sand from the less-delicate sources I thought the only sand shortage to speak of was the specific type required for making concrete, be

> there's a shortage of sand from the less-delicate sources I thought the only sand shortage to speak of was the specific type required for making concrete, because wind-blown sand is too rounded off for producing strong concrete. So those endless dunes of wind-blown sand everyone envisions aren't applicable. But when you intend to melt the sand I presume there's an abundant supply.