A “human biomonitoring” study, jointly conducted by the German Environment Ministry and the Robert Koch Institute, is sounding the clarion warning that plastic pollution is present — and not just in our oceans, estuaries and the fish we eat. Rather alarmingly, the study found toxic levels of plastic byproducts in 97 percent of the blood and urine samples gathered from 2,500 children tested. The children in the research study ranged from 3 to 17 years of age.