Salt is extracted from mines or sea waters.
Salt can be extracted from mines or sea water.
Salt is extracted from salt mines.
Salt can be extracted from sea waters (not mines); after evaporation of water salt remain as a crystallized solid.
salt is not produced but it is extracted from sea water throught evaporisation of water and then purifying it.
Salt is extracted from mines or sea water.
Salt is extracted from salt mines or from sea waters.
Salt is extracted from salt mines as a solid or as a brine.
Salt is extracted from mines or sea waters.
Salt is extracted from mines or sea waters.
Salt is extracted from mines or sea waters.
Salt is extracted from mines or sea water.
Salt is extracted from salt mines or sea/ocean waters.