They would have eased stack emissions for Hillary’s detention/processing camps had she won.
Fly ash brick are being used all over the world, and have been for centuries I believe? Fly ash makes great, light and easy to cut fireproof bricks.
The materials engineers need to find an economic use for the coal firebox ash. It can be done; no doubt in my mind. The travesty is hauling it off to a dump somewhere and having heavy metals leached out of the dump site by rain and polluting ground water. Where there is a will there is a way, and the industry has to find a means to make this a marketable product.