How much plastic is lethal for marine life? Less than you think, study says

Researchers retrieve a cage containing mussels used as bioindicators to monitor microplastic and chemical pollution in the Saronic Gulf, Greece. — Reuters

Marine animals inevitably eat what we toss in the ocean, including pervasive plastics – but how much is too much?

The bar is low, according to a new study, less than three sugar cubes worth could kill birds like Atlantic puffins, for example.