Cement production causes around eight percent of global greenhouse gas emissions. While CO2 is emitted when plants are burned, it remains bound in the biochar over the long term. The first concrete products with integrated biochar are problematic. But a new system of processing the biochar into pellets avoids this and offsets all the emissions produced in the production of both the pellets and the concrete.
www.empa.ch/web/s604/carbon-pellets-in-concrete