This post is also available in: Deutsch (German)
Since our summer break is over, we are continuing to publish German toolboxes as promised. You can find them on the HOOU website. Have fun with it!
Decentralised Wastewater Treatment tackles water pollution in rural areas.
Terra Preta Sanitation rediscovers a biowaste/sanitation system.
Urine Utilisation fertilises soil for non-food agriculture.
Sustainable Irrigation saves water in agriculture.