sources

1 Source: United Nations Development Programme website at https://www.undp.org/content/undp/en/home/sustainable-development-goals/goal-6-clean-water-and-sanitation.html
accessed January 30, 2021.

2 Source: UNICEF website at
https://www.unicef.org/innovation/innovation_81929.html
accessed January 30, 2021.

3 Source: Centers for Disease Control and Prevention (CDC) website at
https://www.cdc.gov/healthywater/global/diarrhea-burden.html
accessed January 30, 2021.