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…
Reservoir
Reservoir, an open-air storage area (usually formed by masonry or earthwork) where…
Sewer
Sewer, conduit that carries wastewater from its source to a point of treatment and disposal. The…
Aqueduct
Aqueduct, (from Latin aqua + ducere, “to lead water”), conduit built to convey water. In a restricted sense,…
Water cycle
Water cycle, also called hydrologic cycle, cycle that involves the continuous circulation of…
Groundwater
Groundwater, water that occurs below the surface of Earth, where it occupies all or part…
Water well
Aquifer Aquifer, in hydrology, rock layer that contains water and releases it in appreciable amounts. The rock…
Firefighting
Firefighting, activity directed at limiting the spread of fire and extinguishing it,…




