Saline water is water that contains a significant concentration of dissolved salts, primarily sodium chloride. It is commonly found in oceans and seas, where it makes up about 97% of the Earth's water. Saline water is not suitable for drinking or irrigation due to its high salt content, which can be harmful to most living organisms. In addition to oceans, saline water can also be found in salt lakes and underground aquifers. The presence of saline water plays a crucial role in various ecosystems and is essential for certain industries, such as desalination and aquaculture, which rely on managing salt levels for sustainable practices.