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Lack of strong and reliable institutions means that basic services may be best supplied by local, appropriate technology rather than relying on large infrastructure projects.
Water conservation is important even when there is high rainfall, as high use of water makes wastewater treatment more difficult, and causes a larger body of water to become polluted.
Public education, particularly in public health, hygiene. Germ theory not a part of popular consciousness - bacteria and viruses are often not seen as the likely cause of a disease.