Gypsum may be an unfamiliar name to many but ... are grey and there is a smell of dust in the air. "With ceilings as high as they are you don't really feel like you're in a mine," says one of ...

Campione said she suspects that certain materials left at the landfill, such as drywall and gypsum, might be contributing to the smell. “For me, it’s the same smell that’s associated with ...