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Water (Supply facilities (sources (river/lake/stream, mountain,…
Water
Supply facilities
maintenance
construction
sources
river/lake/stream
mountain
underground
seawater
Pump
Wastewater treatment plant
Transportation
pipeline
sewers
aqueduct
water tank
Waste
Chem waste
Plastic
Oil
Disease
Third World
Accessibility
Drinkable
Availability
usage
household
industry
energy
Treatment
non-drinkable water to drinkable
Waste treatment
oceans and seas
flora and fauna
population
Geography