‘Everywhere we looked’: trillions of microplastics found in San Francisco bay
The most comprehensive study to date of microplastics in California has turned up a mind-boggling amount of plastic particles in the San Francisco bay.
An estimated 7tn pieces of microplastics flow into the San Francisco bay via stormwater drains alone, researchers discovered. Nearly half of the microscopic particles found in stormwater looked suspiciously like tiny fragments of car tires, which rainfall washes off the streets and into the ocean.
Treated wastewater contributed an additional 17bn particles of plastic, according to the study. Researchers also found plastic in sediment collected from the bay and its many tributaries and inside the digestive tracts of fish.
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(Photo credit: Sebastian Kennerknecht/Alamy)