I don't know why you decided someone saying the US has plenty of junk land must be talking about your home. I was referring to dry salt flats, abandoned strip mines, and the like. The vast amounts of space under major cities would also make good landfill volume.

Because the entire idea that land can be junk leads to a rapid broadening of the definition of junk. Your NIMBY attitude of “out of sight, out of mind” is exactly how we ended up in this mess in the first place.