DECAY

15 pieces of trash and when they will disintegrate:

Paper traffic ticket: 2-4 weeks
Cotton rag: 1-5 months
Degradable polyethylene bag: 2-3 months
Piece of rope: 3-14 months
Wool stockings: 1 year
Bamboo pole: 1-3 years
Unpainted wooden stake: 1-4 years
Painted wooden stake: 13 years
Wooden light pole: 15-36 years
Railroad crosstie: 30 years
Tin or steel can: 100 years
Aluminum can: 200-500 years
Plastic six pack cover: 450 years
Glass coke bottle: unknown

Source Unknown.