All the issues regarding deforestation.

Poverty, Drought and Felled Trees Imperil Malawi Water Supply

DZALANYAMA FOREST RESERVE, Malawi — Out of desperation, soldiers were dispatched to the national forest here last year to defend the capital, Lilongwe, less than 30 miles away. Their mission was not to save it from an invading force, but to keep water flowing to its taps.

Source: The New York Times