Our Timeline about: How long things take to decompose?

Room 9 have been working on recycling. We made a timeline. We discovered that a paper bag takes 2.5 months to decompose. We discovered that a milk cartoon takes 5 years to decompose.
A tin can takes 100 years to decompose. An aluminium can takes 200.500 years to decompose. However meat trays and polystyrene never decomposes.