Biochar Production and Emission Offsets (IMAGE) DOE/Pacific Northwest National Laboratory Caption Carbon emissions can be sustainably offset by producing biochar from waste and residue biomass, as demonstrated in this schematic of the pyrolysis process to create biochar. Credit Pacific Northwest National Laboratory Usage Restrictions Credit PNNL 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.