How Dams Hold Back Millions of Gallons of Water
Dams are one of the most impressive feats of civil engineering, holding…
Water scarcity
Water scarcity, insufficient freshwater resources to meet the human and environmental demands of a…
Glacier
Glacier, any large mass of perennial ice that originates on land by the recrystallization of snow or other…
Lead poisoning
Lead poisoning, also called plumbism, deleterious effect of a gradual accumulation of lead in body tissues, as…
Chlorine
Chlorine (Cl), chemical element, the second lightest member of the halogen elements, or Group…
Water purification
Water purification, process by which undesired chemical compounds, organic and inorganic materials, and…
Aqueduct
Aqueduct, (from Latin aqua + ducere, “to lead water”), conduit built to convey water. In a restricted sense,…
Groundwater
Groundwater, water that occurs below the surface of Earth, where it occupies all or part…
Indus River
Indus River, Tibetan and Sanskrit Sindhu, Sindhi Sindhu, or Mehran, great trans-Himalayan river of South Asia. It is…
