(IMAGE) Concordia University Caption Xianming Zhang: “Persistent organic pollutants are very stable, bioaccumulative and toxic, meaning they do not break down easily and can move through the global environment and accumulate up through the food chain." Credit Concordia University Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.