Biochar (IMAGE) Chalmers University of Technology Caption Biochar binds DDT effectively, so that the toxin is not taken up by soil organisms. Credit Anja Enell, the Swedish Geotechnical Institute. Usage Restrictions For media use License Licensed 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.