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Water plays an important role in all living organisms and daily activities. It can be used in flushing, cleaning, irrigating and entertainment such as swimming and fishing. It can also act as the habitat of marine organisms, as well as transporting goods and human. The most important role of water is as drinking water. Water is neccessary for all living organisms.

Water pollution means the deterioration of water quality due to the presence of certain chemicals, which make it unsuitable for the usage of organisms. In Hong Kong, the pollutants include: Bateria, Organic wastes, Inorganic wastes, heavy metals, heat pollution and crude oil. The serious problems lead by these pollutants create great damages to Hong Kong's economy and environment.

The water acts an extremely important role in all biology and the activity.Its available Yu Chongshui, the lavation, the irrigation and the entertainment function, for example swim and fish.It also may take in the water the biological habitat, the transportation cargo and the human.The water most vital role then is does drinks the water.The water is all biology all essential. The water pollution is refers to some material the existence to go bad the water quality, does not suit the biological use.In Hong Kong, the water quality pollutant includes: Cause of disease, organic waste, inorganic waste, heavy metal, temperature pollution and greasy dirt.These pollutant bring about the serious problem suffers make Hong Kong's economy and the ecology to lose enormously.

Water plays an important role in all activites of living organisms. Water can be used in flushing toilet, washing clothes, watering plants and entertainment such as swimming and fishing. Water can be a habitat for organisms living under the sea and as a means of transportation for both human and stock. A more important use of water is as a drink for human. Water is vital for all kinds of living organisms.
Water pollution refers to the deterioration of water quality due to the presence of material, making it unsuitable for use by living organisms. Water pollution in Hong Kong includes pathogeny, organic waste, inorganic waste, heavy metal, temperature pollution and oil pollution. Serious problems caused by these pollutants are a big lost in both the economy and ecosystem of Hong Kong.