Yes, I have read that study as well. What's happening is the plastics are breaking down into really small pieces. Nanoplastics are smaller than microplastics, and plastics were showing up in wild areas in the United States, for example, far away from civilization, suggesting that these plastics were being picked up by the wind and the air and being redistributed. Plastic has literally been found everywhere on the planet, including far Arctic regions and Mount Everest. We know these plastics are not just being deposited in these locations as litter. They're ending up in these areas because they are travelling on ocean currents and winds, etc.
On April 28th, 2021. See this statement in context.