Aaron Houston, AlterNet – Buried in the latest Monitoring the Future survey — the major annual, federally funded survey of teen drug use — is an astonishing finding: More 10th-graders now smoke marijuana than smoke cigarettes. . . In the just-released survey, 13.8 percent of 10th-graders reported smoking marijuana in the past 30 days (considered “current use” by researchers), while just 12.3 percent smoked cigarettes. For eighth and 12th grades, cigarette use still exceeded marijuana, but the gap narrowed to insignificance. This year, current and past-year marijuana use increased for eighth- and 12th-graders and declined for 10th-graders, but none of the changes were large or statistically significant. In contrast, current cigarette smoking did drop significantly for 10th-graders. Changes for most other drugs were marginal, except for a significant increase in methamphetamine use among 10th-graders.