Using complex computer models, the team was able to prove that the nanoplastic particles can bind tetracycline and thus impair the effectiveness of the antibiotic. "The binding was particularly strong with nylon," emphasizes Lukas Kenner, pointing out a largely underestimated danger indoors: "The micro- and nanoplastic load is around five times higher there than outdoors. Nylon is one of the reasons for this: it is released from textiles and enters the body via respiration, for example."