![\"English:](\"https://commons.wikipedia.org/wiki/File:4_ounces_of_marijuana.JPG\")
English: Four ounces of low-grade marijuana, usually referred to as a quarter-pound or QP. (Photo credit: Wikipedia)
A new study on drug use among U.S. workers has uncovered a broad increase in positive marijuana tests in employee screenings. Researchers wonder whether it is a foretaste of what is to come as Americans become more accepting of marijuana and more states legalize recreational use of the drug. Positive tests for marijuana in employment drug…
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