Water pollution

Topics: Water, Water pollution, Pollution Pages: 2 (547 words) Published: November 8, 2013
97% of the water on the Earth is salt water and only 3% is fresh water which the majority of human uses require; slightly over two thirds of this is frozen in glaciers and polar ice caps. The remaining unfrozen fresh water is found mainly as groundwater, with only a small fraction present above ground or in the air. However, water is now being heavily polluted by nobody else but human. So what are the causes and effects of water pollution? The causes of water pollution vary. However, we can sum them up in to two groups: One is direct causes and the other is indirect causes. The direct causes are what are dumped directly into water bodies, such as raw sewage, household waste or chemicals. In developing countries, an estimated 90% of waste water is discharged directly into river streams without treatment. Leaking septic tanks and other sources of sewage can cause groundwater and stream contaminated ion. And whenever we use personal-care products and household cleaning products, we should realize that almost all of them go down the drain. Studies have shown that up to 90% of your original prescription passes out of you unaltered. Also, almost all bodies of water in the world have some level of pollution from chemicals and industrial waste. Most hazardous liquid waste solvents, heavy metals, and radioactive materials are injected directly into deep ground water via thousands of “injection wells”. The indirect causes are air pollution and heat. Well, surprisingly enough, air pollution contributes substantially to water pollution. Pollutants deposit out of the air and then cause problems like mercury contamination in fish and acidification of lakes. Most of the air pollution that affects water comes from coal-fired power plants and the tailpipes of our vehicles, though some also comes from industrial emissions. Heat is also a water pollutant, increased water temperatures result in the deaths of many aquatic organisms. These increases in temperature are...
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