Supported by CREDIT SUISSE FOUNDATION, Dietschweiler Foundation &

Swiss Federal Office for the Environment FOEN (Bundesamt für Umwelt, BAFU)

Swisslos Kanton Aargau, Ernst Göhner Stiftung, Avina Foundation

Christoph Merian Foundation, Lotteriefond Zug, Lotteriefond Thurgau, Hostelling International