Green roofs act as the first barrier to intercept microplastics from urban atmosphere

Green roofs act as the first barrier to intercept microplastics from urban atmosphere

Green roofs are often considered barriers against polluted precipitation, but their effectiveness in capturing airborne microplastics remains unclear. Here we evaluate modular green roofs under simulated wet deposition to assess their ability to intercept and retain microplastics. We find that green roofs remove over 97.5% of deposited microplastics. In Shanghai, China, this corresponds to an annual interception of approximately 1.70 × 10¹² part…