New contaminants: existence and knowledge gaps (IMAGE) Biochar Editorial Office, Shenyang Agricultural University Caption New contaminants: existence and knowledge gaps Credit Fengchang Wu, Brett Robinson, Yanzheng Gao & Fei Dang Usage Restrictions No Restriction 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.