The Hidden Journey of Aging Microplastics: How Time Shapes Their Environmental and Biological Footprint

In recent years, microplastics (MPs) and nanoplastics (NPs)—minute fragments generated from the breakdown of plastic waste—have emerged as pressing environmental concerns. However, it is less commonly recognized that these particles are not static; they undergo continuous transformation. A recent review by Li et al. (2025) offers a comprehensive overview of how natural aging processes profoundly influence the environmental behavior and biological impacts of these plastics.