| PAHO/WHO | EURO/WHO | USAID/WASH |
| Water and sanitation | Water and sanitation | Water and sanitation |
| Solid wastes |
| Solid wastes |
| Control of environmental risks for health | World environment’s troubles |
|
| Workers health |
| Workers health |
| Housing hygiene | Urban environment’s development |
|
| Water quality | Water quality |
|
|
| Food innocuousness | Food hygiene |
| Environmental impact | Environmental impact |
|
|
| Outside air quality | Air pollution |
|
| Inside air quality |
|
|
| Hazardous chemical materials | Hazardous materials |
| Hospital wastes | Hazardous wastes |
|
|
| Biotechnology |
|
|
| Urgent help | Wounds |
|
| Less contaminant technologies |
|
|
|
| Wastewater |
|
|
| Tropical diseases |