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     EduGorilla 
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    1. Sea water needs a different type of purification than does lake water, or, for that matter, any other source of water.
    2. Water purification is neither a one-step, nor a one-rule process. The source, the contents, the standards and the finances will dictate the method and stage of water purification.
    3. The source of water and the money available exclusively dictate the technique to be used for water purification, which can, therefore, not be uniformly applied.
    4. Water purification has no quick-fix solution. It has to be based on scientific studies about the quality of water, the source of water, the usage type and many other such factors.
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