Three sugar cubes worth of plastic enough to kill a puffin, study finds

The study found 35% of seabirds had plastic in their digestive track when they died. Photograph: Ronald Surgenor/PA

Ingesting less than three sugar cubes worth of plastic is enough to kill a puffin, a new study has found.

Scientists measured how much different kinds of plastic seabirds, sea turtles and marine mammals have to ingest to have a 90% risk of it killing them, in the study published in the Proceedings of the National Academy of Sciences.