Melamine cleaning sponges, known as "magic erasers," may contribute up to 4.9 trillion microplastic particles to aquatic environments globally, due to breakdown during use.
“Researchers assessed microplastic release from melamine cleaning sponges under different scrubbing conditions, focusing on the shape, makeup, and number of fibers created. Then they quantified annual accumulation based on typical melamine sponge sales from two popular online retailers.”