Juneau professor Sonia Nagorski breaks down what microplastics are, where they come from and why they’re so widespread.
University of Alaska Southeast graduate student Muriel Walatka gathers samples of beach sand to examine for microplastics at Auke Recreation Area in Juneau in August 2019.
“In the fall of 2019, I taught a new course on plastic pollution. I had twice as many students as expected. I decided to make use of the high number by sending everybody out to various environments in Juneau to collect samples. A tiny blue plastic fiber that fell within a raindrop in the Thane area of Juneau, Alaska. The view is of filter paper that captured the plastic fiber, as viewed through a microscope. “Microplastics are either intentionally manufactured so small, or come from larger plastics that break apart into smaller and smaller pieces over time. Humans are pretty much everywhere, and we bring plastics with us. Plastics are also dispersed via the atmosphere and ocean currents.
“Given that many of the microplastics in the rain seem to be coming in from elsewhere, I can only suspect that most of it is coming from the Pacific Ocean, because this is the source of most of our wind and rain.
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