press_release_conclusion: Littered cigarette butts may be an important source of metal contaminants leaching into the marine environment and potentially entering the food chain, suggests research published online in the journal Tobacco Control.
abstract_conclusion: Considering the estimated number of cigarette butts littered annually, the results of this study indicated that considerable metals including Cd, Fe, As, Ni, Cu, Zn and Mn may enter the marine environment each year from cigarette litter alone.