The world produces approximately 359 million metric tons of plastic every year, half of which is single-use and immediately thrown out. A 2017 study discovered that of the 8.3 billion metric tons of plastics produced, 12% is incinerated and only 9% is recycled. The remaining 79% accumulates in landfills and the natural environment, including the oceans. More than 8 million tons of plastic makes its way to our oceans every year, polluting an already fragile environment due to habitat elimination, destructive fishing practices and other pollutants such as oil spills and reactive nitrogen and phosphorus that rivers like the Mississippi carry into the ocean.
Some of those pollutants enter the water cycle in the form of acid rain. Acid rain poisons everything it comes into contact with—the sulfur dioxide and nitrogen oxides harm humans, wildlife and the Earth. Acid rain was first discovered in the U.S. “in the 1950s when Midwest coal plants spewed sulfur dioxide and nitrogen oxides into the air, turning clouds—and rainfall—acidic,” according to the National Science Foundation. It wasn’t until widespread damaging effects began on forests and bodies of water in the Northeast that Congress took action by passing the Clean Air Act in 1970, which imposed emission regulations to target air pollutants. This was not enough, however, as acid rain became one of the most well-known pollutants during the 1970s and 1980s as it damaged German, Czech and Polish forests in the “black triangle” region and increased the acidity of bodies of water in the U.S., particularly along the Atlantic coast, which in turn harmed the aquatic organisms and ecosystem.
Acid rain may be slightly less of a problem now with effective environmental regulations, but our environment is not any less at risk. There is a new threat to our environment that is falling along with rainwater: microplastics.
A study conducted in 2019 by researchers at U.S. Geological Survey shows that microplastics have made their way into the water cycle and are permeating virtually every surface on Earth with no way to control where the plastic rains down. Researchers discovered that over 90% of the water samples taken along Colorado’s Front Range contained microplastics.
Microplastics are plastic debris that are less than 5 millimeters in length that come from a variety of sources, including microbeads—exfoliants used in skin products and toothpastes— textile fabrics, and larger plastic items that have degraded into smaller pieces after being broken down by wind, the sun and waves. In addition to taking a long time to decompose, microbeads are damaging due to their ability to absorb toxins and are notoriously difficult to remove from the environment due to their minute size. They became such a problem that Congress passed the Microbead-Free Waters Act of 2015, which prohibits the manufacturing of rinse-off cosmetic products containing microbeads. Although there is not enough research at this point to determine how detrimental microplastics are, it is evident that they are polluting the Earth—appearing in remote areas such as the French Pyrenees and even hitching rides on sea breezes.
New research published last month indicates that plastic rain is a huge problem—leaving no place safe from plastic pollution. Researchers collected rainwater and air samples from 11 protected areas in the western U.S. for 14 months and discovered over 1,000 metric tons of microplastic pieces in the rainwater collected, which is “the equivalent of over 120 million plastic water bottles,” according to Wired. The researchers predicted that in just five years 11 billion metric tons of plastic are projected to accumulate in our environment, which is equivalent to the weight of approximately 55 million blue whales.
Asiya Haouchine
is an Algerian-American writer who graduated from the University of Connecticut in May 2016, earning a BA in journalism and English. She was an editorial intern and contributing writer for Warscapes magazine and the online/blog editor for Long River Review. She is currently studying for her Master’s in Library and Information Science. @AsiyaHaou