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Marijuana use is losing some of its taboo among US adults, according to a new analysis of government survey data. In a report published in the journal Lancet Psychiatry Thursday, federal researchers conclude that pot use began increasing in about 2007, coinciding with a drop in the number of Americans who see the drug as harmful. (Samuel, 8/31)

An increasing number of U.S. adults are using marijuana, and attitudes about the drug are shifting – fewer people perceive pot as harmful, according to a new study published in The Lancet Psychiatry. Though the study cannot answer the question of why more Americans are using marijuana, the researchers say the data is consistent with other, similar research. The trend comes as a growing number of states are changing laws to legalize medical, and to a lesser extent, recreational marijuana, which may be playing a role in public perception of the drug. (Welch, 8/31)