If you throw a polyester sweatshirt in the washing machine, it doesn’t emerge as quite its former self. All that agitation breaks loose plastic microfibers, which your machine flushes to a wastewater treatment facility. Any particles that aren’t filtered out get pumped to sea. Like other forms of microplastic—broken-down bottles and bags, paint chips, and pellets known as nurdles—microfiber pollution in the oceans has mirrored the exponential growth of plastic production: Humanity now makes a trillion pounds of the stuff a year. According to the World Economic Forum, production could triple from 2016 levels by the year
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