Leaf-dwelling fungi inside leek (Allium ampeloprasum) and cabbage (Brassica oleracea var. capitata) broke down toxic air pollutants (PAHs) like naphthalene and pyrene by ~65–75%, even when levels on crops reached up to 145.9 ng/g in polluted areas. The breakdown products were non-toxic in bioassays, showing these fungi can clean contaminated produce directly on the plant surface, turning crops into active detox systems in high-traffic environments, reducing exposure to carcinogenic pollutants.