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These items would take the longest time to decompose by natural means in a landfill:

  1. glass - never
  2. rubber, such as tires, rubber gloves, bouncy houses, rubber balls - never in a billion years
  3. heavier plastics, such as eating utensils, drinking glasses, bowls, containers = never in a billion years
  4. lighter weight plastics, such as grocery store bags - never in a billion years
  5. metals that do not rust - never in a billion years
  6. metals that do rust - sometime before a billion years passes by
  7. heavy cardboard - before a few million years

Quickest things to decompose:

  1. organic items, like food wastes
  2. paper
  3. lightweight cardboard
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Q: What items would take the longest time to decompose by natural means in a landfill?
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