Seawater farming addresses the severe lack of freshwater and undesirable soil conditions for agricultural activities in coastal regions. Saltwater, instead of freshwater, can be used to directly support a wide range of sustainable agricultural activities and enrich the soils in the coastal regions.

Freshwater, which is defined by having much lower salts and ions concentration than seawater and brackish water, only composes about 2.75% out of all water on Earth, and 74.5% of all freshwater are contained in the glaciers, which are not readily available for consumption. Freshwater is not distributed evenly, and in many regions around the world, such as the Sub-Sahara region and the Sub-Indian continent, water is seriously scarce or heavily contaminated. Freshwater plays an important role in the biological system and are used in many human activities: drinking, recreation, industry and most importantly, food production. Food production, such as agriculture, consumes a large body of freshwater and the lack of freshwater poses a grave challenge to food security and the eradication of hunger in many places in the world. Seawater farming directly addresses this problem by proposing a radically different method of agriculture that does not depend on freshwater and thus relieves the existing constraint on the current freshwater body. In addition, field researches and experiments have shown that seawater farming can transform soil conditions and increase humidity and rainfalls, which will help to further increase the body of freshwater for future consumption.