A study by Yuegang Zuo, professor of chemistry and biochemistry at the University of Massachusetts Dartmouth, has made a surprising discovery: ninety percent of U.S. bills tested by this laboratory had traces of cocaine on it.
One of the culprits is the cash machine, which tends to spread contamination to other bills.
What is really fascinating is that the figure goes up to 100% in these cities: Detroit, Michigan; Boston, Massachusetts; Orlando, Florida; Miami, Florida; Los Angeles, California. Even in Salt Lake City, Utah, the percentage is 77 percent.
The lowest rates were found in Tokyo and Beijing at 20 percent and Zhuzhou, China (with zero contamination).
One dollar bills were the least likely to be contaminated.
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