Swiss Federal Institute / Swiss Tropical Institute / Villa Tunari Figure / University of Berne Simone Heri / Villa Tunari / University of Zurich / University of Zurich Hans-Joachim Mosler / San Simon University / /
SODIS Foundation / World Health Organisation / United Nations International Children's Emergency Fund / University of Zurich / Swiss Tropical Institute / Urbanisation Local / San Simon University / Swiss Federal Institute for Environmental Science and Technology / University of Berne / EAWAG / SODIS / seen using SODIS / /