Waste water issues with the history along with the growth of the community. That is, when the population was less fragmented and it is not a problem, nothing much. Later, when the community grow more population. The problem with the sewage, followed by the shadows. This is because the sewage is produces in a person's everyday operations, and waste water will be much more multiple and new product compounds are a strange mix of modern with the waste water, which will make it more difficult problems, respectively, in the future.
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