“glass”
Glass is never a viable recycled material. It is far cheaper to make new glass than to melt, cleanse, and reformulate old glass.
It costs far (meaning it also takes more) more in diesel fuel to haul that stuff to a glass recycler than it ever saves in energy otherwise.
I’d always thought it was a matter of same color (clear/brown/green), crush, melt, recast.
Diesel cost to me is a moot issue as the raw silica would need to be brought in to a production location as well for new glass.
The only real question then is the energy cost of sand clean and melt vs the energy cost of sort, clean, crush, glass melt.
I suppose the cost differential would vary based upon the locations proximity to a natural sand source.