Water Polution | Research StarterCITEMAKER > Manually Create Citations > Reference > Encyclopedia (Tick Internet Source)
"Prior to industrialization, water pollution was usually caused by contamination from animal and human waste, leading to outbreaks of cholera and other waterborne diseases. Before the Industrial Revolution in the nineteenth century, humans produced relatively small amounts of refined metals and organic materials. The production of various alloys of copper, tin, lead, and zinc by heating the mineral ores or by using natural copper metal was also minor. During the Industrial Revolution, however, people began to produce cast iron on large scales, burning charcoal to heat iron ores at high temperatures. They also used other methods to refine other metals, such as nickel, aluminum, titanium, cobalt, platinum, chromium, niobium, and molybdenum. The extensive use of such metals resulted in massive increases in exploration, mining, and production, as well as increased use of energy, resulting in waste disposal problems and contamination of water supplies. In addition, growing urban populations produced concentrations of untreated human and animal wastes and associated disease-producing organisms in water bodies ... "