Celtic Sea Salt: Hand-Harvested in Brittany, France In contrast, Celtic sea salt is hand-harvested in Brittany, France, using a traditional 2000-year-old Celtic technique. This method involves the ...

Seawater is known for being quite salty. Salt in the sea, or ocean salinity, is mainly caused by rain washing mineral ions from the land into water. Carbon dioxide in the air dissolves into rainwater, ...