Wonderful R+D work. I believe as low price as it is, salt will be in demand for a long long time. In Aus, 'special character' salts are priced more than 10 times 'common salt' (which is around $2/kg).

Lattest survey of primary school children of knowledge of food. Some 30% of children think all food come from supermarkets except some fruits like kiwi fruits -- these come from Kiwiland ;-) I wonder how many university students in Thailand know where chickens come from... --- KFC is a wrong answer!