Eating a credit card's worth of plastic — a comparison often used to illustrate estimates that people consume about 5 grams of microplastics a week on average — sounds unhealthy on a very visceral level. Learning that those pieces of plastic could later show up in your lungs is even scarier.
Investigations into microplastics exposure and human health have confirmed that not all plastic ingested by humans comes out the other end; at least in some cases, microplastics can be absorbed into the bloodstream or trapped in the lungs.
But scientists don't yet know how the presence of microplastics in the body affects overall health, especially compared to exposures to other environmental chemicals and contaminants.
You may have heard that plastics never fully decompose. In fact, plastic waste slowly breaks down into smaller and smaller pieces, creating microplastics that are so light they can be swept up by the wind.
Microplastics are defined as particles measuring no more than 5 millimeters across, which is about the size of a grain of rice. In the 20-odd years since they were named, scientists have found microplastics in virtually every environment, from ocean floors to mountain peaks, National Geographic reported. READ MORE...
