What items would take the longest time to decompose by natural means in a landfill?

Answer 1

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