/tags/toxic-metals toxic metals en-US Copyright Tue, 12 May 2015 20:11:31 GMT /local-news/2015-05-12/report-hookah-steam-stones-contain-cancer-causing-elements A University of Cincinnati researcher, studying the safety of hookah steam stones, has found residues of toxic metals in simulated smoking… Tue, 12 May 2015 20:11:31 GMT /local-news/2015-05-12/report-hookah-steam-stones-contain-cancer-causing-elements Ann Thompson