Water Pollution

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Questionnaire

Survey Results (click to download)-refer to question 5&6

Power Point

Effects:

Just like air pollution,water pollution is harmful to the natural environment and man.

§Aquatic organisms living in contaminated water would take in the toxic pollutants.For example, around deep bay,have been found containing high concentrations of heavy metals.If people eat a lot of these shellfish,they will be ill.

§ Many beaches are polluted with solid wastes.Some are so polluted with bacteria that they have to be closed.This means a loss of recreational resource.                        

§When the coastal water is heavily loaded with organic wastes,eutrophication occurs.This gives rise to red tides.

    --Dissolved oxygen content in the water will be reduced and fish will be suffocated to death.

    --Some red tides are toxic. The toxin may accumulates in the shellfish and threaten the health of people when being eaten.                         

§Polluted water often gives out an unpleasant odour.

Solutions:

Measures by the government:

-- the Water Pollution Control Regulations set the standard of water quality

-- the harbors of Hong Kong are divided into 10 Water Control Zones

-- sewage collection systems an sewage treatment have been built to treat the sewage before  discharge into the sea

-- government also creates many leaflets to take

people draw the attention how to treat the sewage

e.g. factory owners,restaurant owners

-- monitoring stations are set up.the impact of large-scale projects on water quality is under close supervision and measures taken if pollution problems occur

            

   

Measures by people:

-- cut down the use of the water

-- farmers should not dump the animal wastes to the rivers directly.

-- factories owners should not dump the toxic substances and chemical substances into  the sea directly, it should be after discharged.

-- don’t waste the solid waste to the sea, rivers

How do the government spread the idea of reducing pollution ?

Environmental campaigns:

* exhibitions

*festivals

Pollution Prevention  Seminars

Promotion on environmental awareness of young people :

* talks and exhibitions at schools

*visits to environmental facilities

   

　

　

~End of the Water Pollution~

　

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