It seems there's nowhere left to run from the microplastic (微塑料的) pollution. A small pilot study recently took microplastics from one of Europe's most distant places, the French Pyrenees mountains, and found as many microplastics in the soil as you might expect from a big city like Paris.
The reason? The wind. Researchers now fear that our planet's winds can pick up microplastics from about anywhere and transport them around the world, sometimes in large quantities. "We'd kind of expected it in a city getting blown around," said Steve Allen from the University of Strathclyde in the UK, one member of the team. "But way up there? We expected to find some," he said. "We didn't expect to find so many."
Microplastics are pieces smaller than a fifth of an inch that have broken down from larger pieces of plastic. The forces of nature don't distinguish (区分) between materials like stones and rocks, and plastics. Wind and waves hit plastics and break them down just the same, making them into dust that can then get swept up by the gentle wind and into the atmosphere. It's a continuing environmental concern, as more and more microplastics find their way into our food and air.
The fact that microplastics can be found in large numbers even in distant places is a sign that is has become a global pollution problem. Steve Allen and his team set up collectors 4,500 feet up in the mountains for five months to trap plastic particles (粒子) as they fell to the Earth. The team found that an average of 365 plastic particles fell on their square meter collector daily. This included bits from plastic bags, plastic film and packaging material, among other plastic sources. Many of these materials were small enough to be breathed in without even realizing it. They're in the air, and they're everywhere.
