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http://www.wtsp.com/news/local/story.aspx?storyid=111761&catid=8
St. Petersburg, Florida - Does the cash in your purse or wallet contain traces of cocaine? According to a new report, it probably does. In fact, researchers say nearly 90% of all bills they tested contained traces of cocaine - that's up from 67% in 2007.
Yuegang Zuo, a professor of chemistry at the University of Massachusetts Dartmouth, was the lead author of the study. Zuo presented his findings at the American Chemical Society in Washington, D.C. over the weekend.
Zuo is not suggesting every bill in circulation is used directly in consuming cocaine. But, he says, when contaminated bills are circulated, the residue rubs off on other cash.
The report says the amount of cocaine they detected does not pose a health risk and in most cases was a thousand times smaller than a grain of sand.