Question

explain the importance of the fresh and saline water

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Answer 1

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Though the term specifically excludes seawater and brackish water, it does include mineral-rich waters such as chalybeate springs. ... Water is critical to the survival of all living organisms. Some organisms can thrive on salt water, but the great majority of higher plants and most mammals need fresh water to live.

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Answer 2

Answer:

Fresh water (or freshwater) is any naturally occurring water except seawater and brackish water. Fresh water is generally characterized by having low concentrations of dissolved salts and other total dissolved solids. Though the term specifically excludes seawater and brackish water, it does include mineral-rich waters such as chalybeate springs. Fresh water may include water in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers, streams, and even underground water called groundwater.

Water is critical to the survival of all living organisms. Some organisms can thrive on salt water, but the great majority of higher plants and most mammals need fresh water to live.

Fresh water is not always potable water, that is, water safe to drink. Much of the earth's fresh water (on the surface and groundwater) is to a substantial degree unsuitable for human consumption without some treatment. Fresh water can easily become polluted by human activities or due to naturally occurring processes, such as erosion.

Together with temperature, salinity controls the density of seawater, determining whether it sinks or floats. Salinity has a major effect on the flow of deep ocean currents that move heat from the tropics to the poles and affect global climate.