Nacka nature school is an information center on ways to manage wastewater. It was set up in 1989 at village Velamsund, near Stockholm city, Sweden, by the Nacka municipality, home to approximately 70,000 people. Velamsund is situated in an archipelago once greviously affected by sewage discharge and the toxic remnants of more than a hundred years of industrial activity. This was definitely a provocation for the school to be set up: today, study groups from all over the world visit the school for lessons in ecological sanitation, and the archipelago's clean-up