The Apu Pachatusan – a seasonal glacier that rises over 15,000 feet above sea level (4,842 meters) and one of the most important sites in the Inca religious world – provides fresh water to the communities at its base. But its existence is threatened.

In Cambodia’s Tonle Sap lake region, local people are making the rules to protect the freshwater that is necessary for their survival.

Costa Rica recognized the threat of diminishing fresh water sources long ago, and has been working successfully to prevent it. China has been using the country's progress as a model.

Listen as CI's reporter walks us through how Lashi Lake's freshwater supplies are being protected and conserved by local partners.