Population of several billion people access to clean water sources have little or no access. This group uses potable water for cooking and washing. From the same water source and sewage disposal of hazardous waste.
Thousands of people, millions of people access to clean water or access to a little. This group of people use drinking water and cooking water from the wash to the same sources that use of impurity and a dangerous waste.
The multi-billion population of access to clean water sources or access. Just a little. This group used to eat food and water purification from the same sources of water pollution and the use of it, the danger