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| Topic: |
History
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| Number of pages / Number of words: |
5 / 1329 |
Essay's paper body
The ancient Egyptians used a chemical ? alum ? to settle particles of pollution out of water as early as 1500 BC.
Disease was also linked with drinking murky water, or living near bodies of dirty water. However, it was not until the mid- to late 19th century that scientists like Louis Pasteur and John Snow made a clear link between dirty water and diseases like cholera...
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Modern water treatment plants still filter water through sand, charcoal, or other materials to remove natural organic matter, microorganisms, dirt, and certain toxic metals. Some plants still use alum and other chemicals to settle out particles from water in a process called flocculation or coagulation...
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General points of the essay
Air and Water Pollution in Saigon
Water Pollution Solutions
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Phosphates In Water Pollution
Reducing Air and Water Pollution
Water Pollution Control
Water Pollution: Is It As Big Of A Problem As We Think?
Water and Air Pollution Analysis
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Water and air pollution
water pollution and solutions
More urgent action needs to be taken by the Australian people and all levels of government to preserve Australia’s scarce water resources, replenish its natural aquifers and promote subsidies to encourage rain water tank collection and water rec...
THE CAUSES AND AFFECTS OF WATER POLLUTION
The Implications of Water Pollution
Water Pollution
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