Washing your clothes is causing plastic pollution, but a simple filter could help

(CNN)Tiny plastic particles are polluting our oceans, where they can stay for centuries, harming sea life and making their way into the human food chain. That may not sound like much, but when you multiply it by every household wash, it adds up. It is estimated that around half a million metric tonnes of microfibers enters our oceans this way every year. Although microplastics can be dangerous to some marine life, the health risk to humans is still relatively unknown. Wastewater treatment plants catch some of these fibers, trapping them among a semi-solid gunk known as sewage sludge. But in many countries this sludge is spread on fields as a fertilizer. From here, the fibers may run off into streams, …