When I first heard the term “fly ash” in architecture school, I remember thinking that it sounded pretty sick.  I mean, flies are annoying and it’s gross when they buzz over and land first on some unidentified, dog-generated substance on the ground and then, without a single shred of consideration, approach and settle on the rim of your drinking cup or slice of pecan pie.  But it boggles the mind to think about the enormous number of flies you’d have to crisp in order to produce so many metric tons of fly ash that there’d even …