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Water is a chemical compound with the formula H2O that covers 71% of the Earth's surface and is vital for all life. It can exist in solid, liquid, and gas states and appears naturally in many forms on Earth. The human body contains 55-78% water and needs 1-7 liters daily to avoid dehydration. Water regulates the Earth's temperature and its pollution poses a major threat, as over 780 million people lack access to clean drinking water.















