“…The major sources of fluoride are drinking water, food, dental products (mostly tooth paste), pesticides (NRC, 2006;USEPA, 2010b), and tea (Shu et al, 2003;Wong et al, 2003;Yi and Cao, 2008). Additional fluoride exposure from air occurs in some areas around the world due to industrial emissions (ATSDR, 2003;Jagtab et al, 2012), electrical utilities, coal, and volcanoes (ATSDR, 2003).…”