Are Microplastics in Our Water Becoming a Macroproblem?

October 26, 2015 - You might not be able to see them, but they're in the water. Although trash heaps are easier to spot inwaterways, microplastics—pieces of plastic smaller than five millimeters—have started to stir more concern. Acting assponges, the pieces soak up the chemicals around them and often make their way through the food chain, ending up on dinnerplates. Most microplastics are created over time from larger pieces or directly from microbeads in products like face washes or toothpaste. The pieces are so small they pass through waste treatment plants and into waterways.