Every few years, the tires on your car wear thin and need to be replaced.

Every few years, the tires on your car wear thin and need to be replaced.
But where does that lost tire material go?
The answer, unfortunately, is often waterways,
where the tiny microplastic particles from the tires’ synthetic rubber carry several chemicals that can transfer into fish, crabs and perhaps even the people who eat them.
Millions of metric tons of plastic waste enter the world’s oceans every year.
In recent times, tire wear particles have been found to account for about 45% of all microplastics in both terrestrial and aquatic systems.
Tires shed tiny microplastics as they move over roadways.
Rain washes those tire wear particles into ditches, where they flow into streams, lakes, rivers and oceans.
Along the way, fish, crabs, oysters and other aquatic life often find these tire wear particles in their food.
With each bite, the fish also consume extremely toxic chemicals that can affect both the fish themselves and whatever creatures eat them.
Some fish species, like rainbow trout, brook trout and coho salmon, are dying from toxic chemicals linked to tire wear particles.
https://www.independent.co.uk/news/science/pollution-microplastic-waste-tires-b2794350.html