Finding a safely managed source of water is a daily challenge for more than two billion people worldwide, and water, sanitation and hygiene-related diseases such as cholera, dysentery, and typhoid are still to blame for the deaths of one million people each year.

The World’s Water Access

2.1 billion people worldwide lack safe water at home. 4.5 billion people worldwide have no toilet at home to safely manage excreta.

Worst countries for drinking water (Percentage of population who still drink surface water):
1. Papua New Guinea - 42%
2. Angola - 24%
3. Kenya - 23%
4. Eritrea - 21%
5. Tajikistan - 18%
6. Liberia - 17%
7. Sierra Leone - 16%
8. Madagascar - 16%
9. Afghanistan - 15%
10. Swaziland - 15%

Worst countries for sanitation (Percentage of population who still defecate in the open):
1. Eritrea - 76%
2. Niger - 71%
3. Chad - 68%
4. South Sudan - 61%
5. Benin - 55%
6. Togo - 51%
7. Namibia - 50%
8. Sao Tome and Principe - 50%
9. Burkina Faso - 48%
10. Madagascar - 44%
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Alex E

Ecoclimax is defined by Odum (1969) as the culmination state after a succession in a stabilized ecosystem in which maximum biomass (or high information content) and symbiotic function among organisms is kept per unit of available energy flow.