| |
| | World Water Day 2001: Sanitation: Controlling Problems at Source |
 | | Diseases due to poor water supply, sanitation, and personal and domestic hygiene cause 4.0% of all deaths and 5.7% of all disability or ill health in the world. |
 | | In many areas of the world, particularly in water scarce regions, treated wastewater has been used for numerous activities in urban settings including: irrigation of golf courses and public parks, creation of recreational lakes, street cleaning, environmental restoration, car/train washing, fire protection, and for toilet flushing. |
 | | For example, after conventional secondary treatment, chemicals may be added to the water to help remove particles, the water may be filtered through several different types of filters, it may be processed through a membrane, and may be disinfected at several different stages of the process. |
| www.who.int /water_sanitation_health/en/sanitation.html (6254 words) |
|