Unlike regions that rely on traditional rock salt, Tucson’s Department of Transportation and Mobility, or DTM, uses magnesium chloride, an anti-icing solution, to prevent ice from forming.

RECENT information has shown that growth retardants such as (2-chloroethyl) trimethyl ammonium chloride (CCC) and 2,4-dichlorobenzyltributyl phosphonium chloride (‘Phosfon’), applied as foliar ...