The core activity of Carbon Queen GmbH is the development, manufacture and marketing of devices that enable the production and use of plant charcoal (also known as biochar). In particular, the company focuses on the production of grill devices that not only serve for cooking and grilling, but also enable the production of plant charcoal. This plant charcoal can then be used as a natural fertilizer in the garden to improve soil fertility and simultaneously bind CO2 from the atmosphere.