Save the Fish
Tin foil: how long does it take to break down in the sea?
Estimated time to break down in the sea: > 1,000 years. Source: Aquarium of the Bay (aquariumofthebay.org). The source gives 1,000–2,000 years. We show the lowest figure, so the item never looks safer than it is.
Tin foil: why is it harmful to the sea?
NPS says it will never decompose; shiny bits get swallowed.
Tin foil: does it really disappear?
Only very slowly. Aluminium corrodes rather than rots, and torn sharp edges and the plastic lining stay behind for a long time.
Tin foil: how harmful is it compared with other trash?
Harm score 6 out of 10: lasts 4/4, toxic 1/3, wildlife 1/3. It ranks 16 of 31 on our list. This score is our own simple scale for comparing items in the game. It is not an official index.
Tin foil: what is it made of?
Material: Aluminium. A typical one is about 6 cm long and weighs about 2 g.
Tin foil: what can I do?
Cans and foil can be recycled again and again: rinse them and use the recycling bin.
Tin foil: what lasts longer, and what breaks down sooner?
Lasts longer: Glass jar. Breaks down sooner: Fishing line, Bottle cap, Toothbrush.
Tin foil: where does this figure come from?
From “Marine Debris Prevention: decomposition key”, Aquarium of the Bay (San Francisco). Checked on 2026-10-15.
The source says“Aluminum foil 1,000-2,000 years”The source's limits (in English): Educational estimates 'in the marine environment'.