Arusha, Tanzania Biogas, Treeplanting and Water-Nanofilter Brilliant 4.7 (32) Flex Option 158 € per week · 4 ‑ 24 weeks · Age 18+ · Help us to save our beautiful environment and spread the nanofilters to clean water from diseases and fluoride to ensure drinking water in maasai villages! Details > Airport Taxi Housing Food Details