Abstract
Water covers 363 million square km, or 72% of the earth’s surface. The vast majority of this water is saline (96%), frozen (2%) or groundwater (1%). The 10\(^5\) km\(^3\) of surface freshwater (0.008%) is in turn concentrated almost entirely in three large great lake systems (Fig. 3.1), with a vanishing small amount of surface freshwater forming lakes and rivers.
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Zufferey, R., Siddall, R., Armanini, S.F., Kovac, M. (2022). Aerial-Aquatic Locomotion in Nature. In: Between Sea and Sky: Aerial Aquatic Locomotion in Miniature Robots. Biosystems & Biorobotics, vol 29. Springer, Cham. https://doi.org/10.1007/978-3-030-89575-4_3
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DOI: https://doi.org/10.1007/978-3-030-89575-4_3
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