Biology Project—Land Pollution in Hong Kong
Content
• Member list
• Pollution Sources
• Effect
• Method to solve the problem
• Thanks for
• The end
Member list
• Cheng Tak Shing (4)
• Ho Chung Ting (7)
• Lee Chek Fu (9)
• Wong Chi Fun (15)
• Yu Choi Yan (19)
• Yuen Wai Ho (21)
Pollution Sources
1. The dumping of wastes and deposits.
2. Many commercial activities result in the production of large volumes of solid waste material.
3. Human activities of domestic households, commercial and manufacturing business and construction sites .
Pollution Sources
There are three main ways of waste disposal
• Landfill
• Littering
• Incineration
Pollution Sources
Landfill
• About 4/5 to 3/4 of the solid
wastes is disposed of by
landfilling.
• The solid wastes are
compressed and covered
with soil on landfill sites
Pollution Sources
Landfill’s common components :• Tires,• Computers,• Plastic bags,• Packing materials,• Foam,• Paper,• Light bulbs,• Household wastes etc.
Pollution Sources
Littering’s main venues:
• Parks
• Streets
• Bus stops
• Near shops
• Picnic areas
Pollution Sources
Incineration• About 1/4 to 1/5 of solid wastes in HK is disposed of by incineration• Reduces the volume of the waste by approximately 85%• Kills the disease-causing organisms at
high temperature
Effect
• Soil erosion
• Landfill gas, like methane, may be generated by the decomposition of organic matter.
• Disease carried by mosquitoes, flies, mouse
• Lower the living quality of resident
Effect
• Groundwater from landfills may contain toxic/harmful chemicals.
• Damage to plant and wildlife habitats
• Depress the value of surrounding land
Method to solve the problem
4Rs
• Reuse, e.g. reuse wastes
to do some art works,
recharge batteries
• Reduce, e.g. use both
side of paper, use fluorescent light bulb
Method to solve the problem
• Recycle, e.g. put aluminum cans, paper, plastic bottles in recycling bin, recycle metals
• Replace, e.g. replace tissues by towels, use shopping bags but not get plastic bag every time
Method to solve the problem
• Educate people against wasting and littering.
• Organic waste can be dumped in places far from residential areas.
Thanks for
• http://www.ust.hk/
• http://www.yahoo.com.hk/
• http://skw.hkcampus.net/
The End
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