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