Overview

• The study found median microplastic concentrations of 528 particles per cubic meter in homes and 2,238 particles per cubic meter in cars.
• Ninety-four percent of detected microplastic particles measured less than 10 micrometers, making them capable of deep lung penetration.
• Adults inhale about 68,000 microplastic particles sized 1–10 micrometers and about 3,200 particles sized 10–300 micrometers each day, exceeding previous estimates by more than 100-fold.
• Researchers collected 16 air samples from apartments and car cabins under realistic conditions and employed Raman spectroscopy to quantify fine microplastics.
• The authors urge expanded research and updated public health guidelines to address potential risks such as oxidative stress, immune disruption and organ damage.