Water pollutionGroup 4

Leader: Wong Chun Wa (20)

Members:Leung Chi Fung (14)

Tam Ho Chun (16)Chan Wai Chun (25)

Chau Man Ha (27)Lee Pui Yan (35)Wu Kai Wai (42)

Content

• Introduction• Reasons• Effects• Measures• References

Introduction

What is water pollution?

• local, regional and global environmental problem

• caused by the direct discharge of pollutants into a waterway

• connected with air pollution and land uses

Reasons of water pollution

There are two main sources of water pollution:

-Sources of stream pollution

-Sources of marine pollution

Sources of stream pollution

• Livestock farms The pig and poultry farms in the New Territories produce a large amount of

manure everyday. Most of this manure is disposed into the streams with little treatment.

• Factories Dyeing and bleaching factories often discharge chemical wastes and metals

into the streams.

Sources of marine pollution • Factories Factories pollute the sea water by discharging the hot water loaded with toxic c

hemicals and metals into sea or pollute the soils on land which are then dumped into sea.

• Transport Oil spillage from ships occasionally contaminates the sea.

• Reclamation and excavation This reduce the rate of flow across the harbour and also reduces the dissolved

oxygen for the aquatic organisms.

• Domestic source

Human excretes are discharged into the sea.

Effects of water pollution

dangerous chemicals (e.g. oil get into the water)

↓fish take in the chemicals

↓when we eat the fish we also could get

sick↓

so this affects not only fish but humans too

acid rain↓

fish and plants will die↓

in a lake or pond, humans won't be able to swim in it

↓also pollutes the plants we eat

↓cause us to get sick

-Making people aware of the problem

-Teach them not to throw any kind of rubbish or toxic waste into harbor, sea, river, reservoir, etc.

- Told them not to throw any kind of rubbish or toxic waste down the drain or sewer, as the water (underground) will eventually enter the sea

How to solve water pollution

-Set up laws to stop the factories discharged pollutants

-Ask the convicts to pay penalties

-Send them to prison if they continuous to do that

-Collect polluted water and treat them again

-Built water channel to collect polluted water

-To stipulate the discharge of polluted water

Conclusion

Nowadays, water is being polluted more seriously. Some experts predict water instead of oil will be competed by the countries in the future. Therefore, we should save using the water and keep it clear.

References

• http://home.ied.edu.hk/~s0153024/waterpollution.htm

• http://home.netvigator.com/~taich/water_pollution.htm

• http://www.mediaworkshop.org/techcamp/GroupA/waterecologist/waterpollution.htm

The End