Hunger is an uncomfortable or painful physical sensation caused by insufficient consumption of dietary energy. It becomes chronic when the person does not consume a sufficient amount of calories (dietary energy) on a regular basis to lead a normal, active and healthy life. Today, it is estimated that over 820 million people are going hungry. For decades, FAO has used the Prevalence of Undernourishment indicator to estimate the extent of chronic hunger in the world, thus “hunger” may also be referred to as undernourishment.

Source: Food and Agriculture Organization of the United Nations

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