varies, and depends on physical activity, age, health-related issues, and environmental conditions. For those who work in a hot climate, up to a day may be required.

As many as two billion people lack safe drinking water. Unsafe water can carry disease and is a major cause of death and illness worldwide. Developing countries are most affected by unsafe drinking water.

Sources

Potable water is available in almost all populated areas of the world, although it may be expensive,

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