Fig. 1From: Environmental hazard of polypropylene microplastics from disposable medical masks: acute toxicity towards Daphnia magna and current knowledge on other polypropylene microplasticsRepresentative scanning electron microscopy images of the intact mask layers (A-C) and milled microplastics (D-F) derived from the medical mask inner frontal layer, middle filtering layer and outer layer. White bars on the images represent 100 μmBack to article page