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Water is essential for life. The amount of drinking water required is variable. It depends on physical activity, age, health issues, and environmental conditions. For those working in a hot climate, up to 16 liters a day may be required. Water makes up about 60% of weight in men and 55% of weight in women. Infants are about 70% to 80% water while the elderly are around 45%. [1] Far from thinking of promoting certain national bodies, the study shows several necessary aspects for evaluating drinking water situation ...