You know how you have to buy tires every few years because they “go bald”? As in, they’ve lost that material that was once tread? That material isn’t just disappearing, it flies off the tires in the form of tiny particles that are in the air and water. It’s actually really toxic, too way more than other plastics. Fun fact EV tires are even more toxic.

Source: I work in a toxicology lab studying microplastics.