Plastic Rain

by Chloe Lee

“Plastic rain” refers to the phenomenon of microplastic particles falling from the sky through precipitation. It is caused by plastic fragments blowing into the atmosphere from roads, oceans, and cities. These particles travel long distances through wind currents, eventually mixing with moisture in the clouds. The microplastics fall back to the ground when raining or snowing, contaminating the natural environments far from human activity.

A 2023 study by researchers from the U.S. Geological Survey found that over 1,000 metric tons of microplastics, which is equivalent to more than 120 million plastic bottles, fall on protected areas of the American West each year. These particles are carried by the wind, lifted into the atmosphere, and eventually return to the surface through rainfall or snow. The widespread plastic pollution even reaches the most untouched regions in the environment.

Although scientists first discovered plastic rain in mountain regions and national parks, subsequent studies have found cases of plastic rain all over the world. Microplastics, which are smaller than five millimeters, root from degraded packaging, synthetic clothing fibers, tire dust, and other human-made materials. Experts have warned that this invisible pollution could risk both our ecosystems and human health, as microplastics have already been found in drinking water, soil, and even human blood. Without realization, people are inhaling and consuming plastic particles in their everyday lives.

Efforts to address the crisis remain limited, but scientists are urging stricter controls on plastic production, waste management, and the development of biodegradable alternatives.

Citations

Shivali Best, Science & Technology Editor. “The New Plague of Plastic Rain: Scientists Discover Microplastics in Clouds - and Say They Could Be Contaminating Nearly Everything We Eat and Drink.” Daily Mail Online, Associated Newspapers, 2 Oct. 2023, www.dailymail.co.uk/sciencetech/article-12583753/The-new-plague-plastic-rain-Scientists-discover-microplastics-clouds-say-contaminating-nearly-eat-drink.html.

Hershberger, Scott. “Thousands of Tons of Microplastics Are Falling from the Sky.” Scientific American, Scientific American, 20 Feb. 2024, www.scientificamerican.com/article/thousands-of-tons-of-microplastics-are-falling-from-the-sky/.