Xi’an’s air carries more microplastics than before, study finds

A Xi’an, China study found microplastics in city air within PM2.5 tripled over the study period, with post‑pandemic samples dominated by white/transparent fibers from discarded masks. Inhaled microplastics can deposit in the nose, throat, and lungs, and younger people may be more susceptible. Sources include masks, synthetic clothing, tires, and packaging; aging plastics and ozone may boost release. Outdoors indoors exchange and air monitors, along with cleaner streets and better waste management, could help reduce exposure, and some cities promote reusable masks. The study was published in the Journal of Geophysical Research.