While less toxic solvents have been substituted for
benzene, it still is a component of petroleumproducts, includinggasoline, and is a trace impurity in indus-trial products resulting in continued sub to low ppm occupational exposures, though higher exposures
exist in small, uncontrolled workshops in developing countries. Emissions from gasoline/petrochemical
industry are its main sources to the ambient air, but a person’s total inhalation exposure can be elevated
fromemissions fromcigarettes, consumerproducts andgasolinepoweredengines/tools stored ingarages
attached to homes