Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater …

Freshwater habitats can be classified by different factors, including temperature, light penetration, nutrients, and vegetation.

Apr 3, 2025 · Every living thing on Earth needs water to survive, but more than 100,000 species, including our own, need a special kind of water that can only be found in certain places and is …

Jun 8, 2018 · The definition of freshwater is water containing less than 1,000 milligrams per liter of dissolved solids, most often salt. As a part of the water cycle, Earth's surface-water bodies are …

Aug 8, 2022 · Freshwater is where most of the water we drink comes from and plays countless other important roles in nature. Learn more about the biome and how climate change is …

Experience this map with real-life stories about freshwater challenges and solutions told by National Geographic Explorers who are working to illuminate and protect the wonder of our world.

Nov 6, 2023 · Freshwater ecosystems encompass lakes, rivers, streams, wetlands, and groundwater. They provide essential services supporting human water security and …

May 13, 2025 · From sustaining agriculture and energy to shaping landscapes and communities, freshwater is essential. NASA’s Earth science data helps the nation manage this vital …

Freshwater habitats—such as lakes, rivers, streams, wetlands, and aquifers—house an incredible proportion of the world’s biodiversity: more than 10% of all known animals and about 50% of all …

Freshwater is chemically defined as containing a concentration of less than two parts per thousand (<0.2%) of dissolved salts. Although water is abundant on the surface of Earth, …