https://www.scientificamerican.com/article/microplastics-are-blowing-in-the-wind/

Amid the rugged peaks of the Vicdessos region of the French Pyrenees, the only visible signs of a human presence are a smattering of villages and the odd hiker or skier; it is considered a pristine environment. But even here, scientists have detected tiny pieces of plastic falling out of the air like artificial dust.

A first-of-its-kind study finds these particles have blown in on the wind from at least 100 kilometers away and likely much farther. This is a clear indication that atmospheric transport is yet another way plastic pollution is being distributed around the planet, even to remote areas. “And it suggests that this is a far bigger problem than we have currently thought about,” says study co-author Deonie Allen, of the École Nationale Supérieure Agronomique de Toulouse (ENSAT).