The findings underscore how marine plastic pollution is contaminating everyday food products, with microplastics detected in all sea salt samples tested.
A 2010 packaging law stipulated that 19 essential items must be contained and transported in jute sacks, but the legislation failed to protect the jute industry, which employs three million households.
By comparing snails and mussels from hydrothermal vents in two oceans, researchers found stark differences in levels of microplastic contamination between the two.