Heavy metal smokes

Smoke and flick, it's what many a cigarette user does, but those butts contain toxic heavy metals after the burning tobacco has been drawn into the users lungs and represent an important source of metal contaminants leaching into the marine environment and ultimately entering the food chain, according to researchers published in the journal Tobacco Control. Almost 5 trillion cigarette butts are discarded nonchalantly by smokers every year containing small amounts of cadmium (Cd), iron (Fe), arsenic (As) nickel (Ni), copper (Cu), zinc (Zn) and manganese (Mn). These metals end up in the top 100 millimeters of sediment and deposited at the tidal mark on beaches, according to Sina Dobaradaran of the Bushehr University of Medical Sciences, Bushehr, Iran, and colleagues.