Abstract:
<p align="justify"> Determination of fluoride in environmental samples of pasture and honey leads to the conclusion that these materials may be used as pollution bioindicators in areas of industrial activity. Concentrations of fluoride determined in recent times are above reference values. This observation is reinforced by the occurrence of various oases of bone deformation (fluorosis) and dental problems of ruminants in the area. A synergetic effect of fluoride on the abrasion of coal ash deposited on graze lands is also observed. </p>