A researcher at northwestern Sakarya University found about 13,000 microplastic particles from a single teabag passing into the water. In her research, Meral Yurtsever said microplastics were found in four of 11 cup bags and in all 11 teapot bags of different brands. Plastics, which can take centuries to dissolve in nature, could turn into particles from one micrometer and five millimeters in size, thus becoming microplastics. Study finds single ...