I have come across an article once that Arm and Hammer baking soda is from Trona Mine. This baking soda is processed from soda ash from Trona ore (used for making glass also, fiberglass, etc.). I don'at know which Trona mine A&H sources their soda ash. Not all Trona mines are good though. Some could have petroleum industry pollutions through leaks. Melly
- CS>Baking soda Melly Bag
