Daily cannabis use is on the rise in American adults, finds new study. Increases in daily and nondaily cannabis use among adults after 2007 could be due to increasingly permissive cannabis legislation, attitudes, and lower risk perception.

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Daily cannabis use is on the rise in American adults, finds new study. Increases in daily and nondaily cannabis use among adults after 2007 could be due to increasingly permissive cannabis legislation, attitudes, and lower risk perception.