How Long Until It's Gone?

Estimated decomposition rates of common marine debris items:

Wax Carton               1 monthApple Core                2 months
Cotton Shirt                2-5 months
6-pack Plastic             6 months (if biodegradable)
Plywood                     1-3 years
Cigarette Butts            1-5 years
Wool Socks               1-5 years
Plastic Grocery Bag    10-20 years
Foamed Buoy             50 years
Styrofoam Cup           50 years
Tin Can                      50 years
Aluminum Can            200 years
6-pack Plastic            400 years
Plastic Bottle              450 years
Disposable Diaper      450 years
Fishing Line                600 years
Glass Bottle                Undetermined