담수, or freshwater, refers to water that has low concentrations of dissolved salts, typically less than 1%. It is found in rivers, lakes, and underground aquifers, making it essential for drinking, agriculture, and various ecosystems. Freshwater is crucial for sustaining life on Earth and supports a diverse range of species. The availability of 담수 is vital for human activities, including farming, industry, and domestic use. However, freshwater resources are limited and can be threatened by pollution, overuse, and climate change. Sustainable management of these resources is necessary to ensure their availability for future generations.