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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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You're not under arrest, despite the fact that you probably have some drugs in your pocket.
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Because there's a good chance your paper money contains trace amounts of cocaine.
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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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In Washington, D.C., it's as high as 95 percent.
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Some bills had as much as 1,200 micrograms of coke, about equal in size to 50 grains of sand.
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But most money had much less.
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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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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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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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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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And the paper clues may reveal which cities have the most users.
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Because as any good investigative reporter can tell you, always follow the money.
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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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1 / 14
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显示原文 =This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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2 / 14
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显示原文 =You're not under arrest, despite the fact that you probably have some drugs in your pocket.
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3 / 14
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显示原文 =Because there's a good chance your paper money contains trace amounts of cocaine.
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4 / 14
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显示原文 =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 / 14
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显示原文 =In Washington, D.C., it's as high as 95 percent.
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6 / 14
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显示原文 =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 / 14
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显示原文 =But most money had much less.
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8 / 14
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显示原文 =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 / 14
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显示原文 =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 / 14
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显示原文 =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 / 14
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显示原文 =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 / 14
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显示原文 =And the paper clues may reveal which cities have the most users.
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13 / 14
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显示原文 =Because as any good investigative reporter can tell you, always follow the money.
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14 / 14
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显示原文 =Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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