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Are we losing the amount of water on Earth?

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Although water covers 70 percent of the Earth's surface, water is actually a rare substance that represents just 0.05 percent of the Earth's total mass. Water has nevertheless played a crucial role in the emergence of life on Earth. Without water, the Earth would in all likelihood be a dead planet. The amount of water on the planet has not always been the same, however. read more

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Hydrosphere | Aspen Global Change Institute
Source: agci.org

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