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Assessment
What is the primary source of freshwater on Earth?
Glaciers and ice caps
Rivers and lakes
Atmospheric vapor
Desalination plants
Which of the following is the main cause of water scarcity worldwide?
Natural disasters
Over-extraction of groundwater
Heavy rainfall
Saltwater intrusion
What is the ecological role of wetlands in water management?
Pollutant concentration
Water filtration and flood control
Destruction of aquatic habitats
Increased evaporation rates
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