Save the Fish
Plastic bag: how long does it take to break down in the sea?
Estimated time to break down in the sea: > 100 years. Source: European Commission (europa.eu). The source gives 100–500 years. We show the lowest figure, so the item never looks safer than it is. The European Commission's figure is for plastic bags in general, not specific to sea water.
Plastic bag: why is it harmful to the sea?
Turtles mistake it for jellyfish; it shreds into microplastics.
Plastic bag: does it really disappear?
No. Plastic breaks into smaller and smaller pieces, microplastics, that stay in the water and inside animals. NOAA says plastic may never fully go away.
Plastic bag: how harmful is it compared with other trash?
Harm score 8 out of 10: lasts 4/4, toxic 2/3, wildlife 2/3. It ranks 6 of 31 on our list. This score is our own simple scale for comparing items in the game. It is not an official index.
Plastic bag: what is it made of?
Material: Plastic. A typical one is about 25 cm long and weighs about 5 g.
Plastic bag: what can I do?
Carry a bottle, a cloth bag and a box: every single-use plastic you refuse is one less in the sea.
Plastic bag: what lasts longer, and what breaks down sooner?
Lasts longer: Aluminium can, Cotton swab, Plastic cutlery. Breaks down sooner: Foam buoy, Rubber boot sole, Foam cup.
Plastic bag: where does this figure come from?
From “Plastic Bag Free Day”, European Commission, Speech Repository. Checked on 2026-10-15.
The source says“they take from 100 to 500 years to disintegrate”The source's limits (in English): 'they take from 100 to 500 years to disintegrate'; not specific to sea water.