He’s thought beyond the bricks themselves and also laid out ideas for a brick-making facility in Siwa, Egypt, where agriculture has been decimated by changes to the Sahara desert. A blood brick factory could be built there, he says, by spreading an animal-blood-based glue over a sand dune and then letting the sand “migrate.” The shifting sands would leave behind a blood shell and an interior that could be excavated, strengthened, and then occupied by cattle sheds, a slaughterhouse, and a brick manufacturing area.