A recent research study in the Water Emerging Contaminants & Nanoplastics reports on findings of a significant spike in concentrations of microplastic fibers after human activity in the Salt River. Some of the microplastic fibers came from synthetic plastics fibers in peoples’ swimsuits. ASU researchers are exploring ways to keep microplastics out of places where they contribute to environmental pollution — including polyester and polyamide synthetic fibers such as those in swimwear fabrics. Matthew Fraser, a professor in School of Sustainable Engineering and the Built Environment, part of the Fulton Schools, is a co-author of the study. The nearly 200-mile-long Salt River runs through Arizona’s Gila and Maricopa counties and is the Gila River’s largest tributary.