A key feature of RETENTIS® is its sustainable production from lignin, a byproduct of the pulp industry. While pulp mills extract cellulose from wood for paper and fiber, excess lignin often remains unused. AgroBiogel GmbH uses this valuable material to create a water and nutrient reservoir, allowing carbon to return to the soil. This resource-efficient solution contributes to the circular economy while simultaneously improving soil quality. This transforms a natural raw material into a sustainable water and nutrient reservoir.