Authors state that adolescents’ use of cannabis has fallen slightly since 2010, while respondents’ self-reported use of other drugs, including alcohol and tobacco, are at near-record lows. Young people also reported finding it harder to access cannabis, a trend that has stayed consistent since the late-1990s.
The conclusions are consistent with other studies — such as those here, here, here, here, here, here, here, here, here, and here — finding that the enactment of state laws permitting the use of marijuana for medical or social purposes is not associated with overall rises in cannabis use by young people.