Microplastics in the Air May Pose Serious Respiratory Risks

Tiny plastic particles released into the air from tires and decomposing trash could be contributing to various health problems, according to researchers at UC San Francisco. These particles, known as microplastics, may lead to respiratory issues and other significant illnesses.

A comprehensive review of roughly 3,000 studies suggests that microplastics are linked to conditions such as infertility, colon cancer, and diminished lung capacity. The research also indicates that chronic inflammation of the lungs, which raises the risk of lung cancer, may be influenced by these particles.

Microplastics are defined as particles smaller than 5 millimeters, making them smaller than a grain of rice. These plastics are widespread, with nearly 460 million metric tons produced globally each year. This number is expected to more than double by 2050.

Driving is a significant contributor to airborne microplastics. Tire and road wear from friction releases plastic fragments into the atmosphere. The study represents the first systematic examination of microplastics using methodologies endorsed by the National Academy of Sciences.

Although most of the reviewed research involved animal studies, scientists believe the findings are applicable to humans due to shared environmental exposures.

This study builds on earlier research conducted by UCSF in collaboration with the California State Policy Evidence Consortium (CalSPEC). The consortium, comprising experts from various UC campuses, supplies scientific evidence to California lawmakers.

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