Somewhere between five and 13 million tons of plastic end up in the world’s oceans every year.    This estimate covers large and visible fragments of plastic waste, but not only.    Ocean ecosystems are also increasingly polluted by the arrival and presence of microplastics. These millimeter or micrometer-sized synthetic polymer particles are swallowed by marine fauna, find their way into the food chain, and damage marine ecosystems worldwide.   According to recent studies, almost tw...