urban problem in Hong Kong(10點)

1.air pollution (exhaust fumes releases from vehicles)

2.traffic congestion(narrow street)

3.heat island effect (less vegetation cover in urban areas)

4.Land pollution (solid wastes , landfill)

5.Noise pollution (construction sites)

6.water pollution (discharge sewage without any simple treatment)

7.Urban decay (establishment of new towns,less people live in urban areas,there are no any maintenance for the old buildings)