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 and brackish water, …

Aug 7, 2025 · Freshwater biomes support an astonishing diversity of life. Though they make up only about 3% of Earth’s water, they host 10% of all known animal species and 40% of all fish species.

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.

Water is the world's most precious resource. WWF protects freshwater ecosystems—securing clean water, healthy rivers, and biodiversity for people & nature.

Feb 5, 2026 · Water is essential to life on Earth. It has three phases (solid, liquid, and gas). In these three phases, water ties together the major parts of the Earth’s climate system — air, clouds, the …

Freshwater ecosystems cover less than 1% of Earth's surface, yet are home to at least 10% of Earth's species. Freshwater habitats are incredibly diverse, with more than 400 large-scale ecoregions and …

Freshwater is defined as having a low salt concentration usually less than 1%. Plants and animals in freshwater regions are adjusted to the low salt content and would not be able to survive in areas of …

Nov 6, 2023 · Explore freshwater ecosystems and their vital role in water security, biodiversity, and climate resilience. Learn about threats and conservation efforts.

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 affecting it, below.

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 …