To Lich River which is the natural rivers, tributaries of the Red River, is one of the famous river in the capital, Hanoi. Formerly the mention Lich people think of the gentle river images, clean, cool, where kings often excursions to relaxing entertainment. Beauty that has
been recorded by the poetry handed down to this day. But now, it no longer exists, mentioning Lich is everyone remembered a "huge drain" with black water stream and rising stench concentration anonymously. Along with other rivers in Hanoi, Lich is calling for help. Today the process of urbanization, environmental pollution, especially water environment has been and will be the challenge for the development and survival of human society, especially the developing countries, including Vietnam. To grow in a sustainable way, people always have to find measures to improve production technology, minimizing environmental pollution, and when that happened pollution must be dealt with thoroughly.
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