The ironic result is that in the midst of great plenty, the World Health Organization (W.H.O.) estimates that about one-half of the world's population, wealthy and poor combined, suffers from poor nutrition of one kind or another. This is malnutrition, defined as an imbalance, either a deficiency or an excess, of a person's intake of nutrients and other dietary elements that are needed for a healthy life. (State of the World 2000, Worldwatch Institute) http://www.worldwatch.org/node/3641