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Water resources. A graphical distribution of the locations of water on Earth. Only 3% of the Earth's water is fresh water. Most of it is in icecaps and glaciers (69%) and groundwater (30%), while all lakes, rivers and swamps combined only account for a small fraction (0.3%) of the Earth's total freshwater reserves. Water resources are sources of water that are potentially useful.
People tend to think that the amount of water on the planet is unlimited, yet the amount of water on the Earth will actually stay the same. Of the water on Earth, 97.3% is oceans, inland seas, and salt lakes; the rest is fresh water (icecaps/glaciers, groundwater, freshwater lakes, atmosphere, rivers). The amount of available fresh water to humans and wildlife depends largely on how water quality is maintained.