The rate of decomposition will vary dependent on the environment where the material is decomposing. For example, dry air may slow down decomposition, whereas a humid environment could speed it up.
Here are some general decomposition rate examples:
1. Paper Towels - 2-4 weeks
2. Orange or banana peels - 2-5 weeks
3. Apple core - 2 months
4. Cotton shirt - 2-5 months
5. Plywood - 1-3 years
6. Cigarette filter - 1-5 years
7. Plastic bag - 10-20 years
8. Nylon - 30-40 years