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第1段
1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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2 .You're not under arrest, despite the fact that you probably have some drugs in your pocket.
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3 .Because there's a good chance your paper money contains trace amounts of cocaine.
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4 .According to a study presented August 16th at the American Chemical Society's national meeting, up to 90 percent of American paper bills are contaminated with cocaine.
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5 .In Washington, D.C., it's as high as 95 percent.
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6 .Some bills had as much as 1,200 micrograms of coke, about equal in size to 50 grains of sand.
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7 .But most money had much less.
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8 .The finding doesn't mean that all money has directly touched cocaine, although some bills were doubtless used to snort the drug.
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9 .Other bills may have picked up coke during drug sales, while most probably just got traces transferred from other bills in banks.
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10 .A similar study was conducted two years ago, and at that time about two thirds of American paper money had traces of cocaine.
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11 .Researchers aren't sure why there's been a jump, but the new data indicate that cocaine is still a problem.
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12 .And the paper clues may reveal which cities have the most users.
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13 .Because as any good investigative reporter can tell you, always follow the money.
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14 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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