Presentation on theme: "Biology Project— Land Pollution in Hong Kong. Content Member list Pollution Sources Effect Method to solve the problem Thanks for The end."— Presentation transcript:
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.