Useful Website

1. www.umich.edu/~gs265/society/waterpollution.htm
   
2. www.water-pollution.org.uk/
   
3. en.wikipedia.org/wiki/Water_pollution
   
4. www.CircleOfBlue.org
5.  www.epd.gov.hk/epd/english/environmentinhk/ water/water_maincontent.html
   
6. members.tripod.com/water_pollution_hk/default.htm
   
7. www.gov.hk/en/residents/ environment/water/introtowater.htm