Between 1967 and 2017, the money that Americans spent annually on stuff—from sofas to cell phones—increased almost twentyfold. Some of that stuff will become treasured heirlooms worthy of future generations. Some will be buried in landfills, turned to ash by incinerators, or—in rare cases—recycled into new goods and heirlooms. And some will persist, packed in basements, closets, attics, garages, and storage units. The precise breakdown is unknown, but there are hints. For example, one 2006 study of Los Angeles middle-class homes found that 90 percent of garage space is now used to store stuff,
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