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freshwater
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biological communities of freshwater lakes
Searching for sustainable water supplies in Namibia
Why is seawater so salty?
Which has a lower freezing point, salt water or fresh water?
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freshwater: Media

hydrology
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Searching for sustainable water supplies in Namibia
Learn about efforts to locate groundwater in Namibia, where fresh water is scarce....
Video: Contunico © ZDF Studios GmbH, Mainz
Why is seawater so salty?
An explanation of why seawater is salty.
Video: Contunico © ZDF Studios GmbH, Mainz
Which has a lower freezing point, salt water or fresh water?
Learn why fresh water and seawater have different freezing points.
Video: Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Tatianatatiana/Dreamstime.com

Images

biological communities of freshwater lakes
Figure 4: Major biological communities of freshwater lakes.
Encyclopædia Britannica, Inc.