Most Sea Salt Contains Microplastics

Salt samples from eight different countries including Australia reveal the presence of plastic contaminants from ocean pollution. Each year, humans dump 13 million metric tons of plastic into the ocean. Some of that plastic begins its life as tiny particles, such as microbeads in face scrubs and toothpaste; others as larger pieces that get broken down through mechanical or chemical means.

Estimates vary, but there’s no doubt the amount of plastic now in the oceans is substantial: one 2014 study found that there are more than 5 trillion plastic pieces sharing the seas with marine life, 92% of which are microplastics less than five millimetres in size. Of the many ways that microplastics make their way back to us, the simplest one is through the food cycle.

Tiny marine organisms like krill ingest microplastics, which are about the same size as the zooplankton they feed on. The krill then get