Tubig tabang

Rivers, lakes, and marshlands, such as (from top) South America's Amazon River, Russia's Lake Baikal, and the Everglades in Florida of the United States, are types of freshwater systems.

An tubig tabang iyo an maski arin na natural na nangyayaring likido o nagyeyelong tubig igwang hababang concentrations nin natunaw na asin asin iba pang total dissolved solids. Dai kabali sa termino an tubig dagat asin brackish water, alagad kabali diyan an bakong maaskad na katubigan na mayaman sa mineral, siring kan mga burabod na chalybeate. An tubig tabang posibleng mangahulogan na nagyeyelo asin meltwater sa ice sheets, ice caps, glaciers, snowfields asin icebergs, natural na presipitasyon siring kan rainfall, snowfall, hail/sleet asin graupel, asin surface runoffs na minaporma nin inland na lawas nin tubig siring kan wetlands, ponds, danaw, salog, streams, as well as groundwater contained in aquifers, mga subterranean salog asin mga danaw.

Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive.