[sliverstorm]

The supply of sand is also finite, but we aren't likely to run out any time soon.

Just because the supply is finite, doesn't automatically mean we will exhaust it.

[byroot]

Actually, as stupid as it sounds, we do start to run out of sand to make concrete in some areas.

A quick search about "sand shortage" will show you.

[ShirtlessRod]

True, but I would guess that oil is used at a much higher rate than sand, especially considering the relative availability of each.

[mistermann]

The question is whether we will use it all up before renewables become cheaper though.