Research Says One in Four Tenth Graders Has Smoked Marijuana - kcentv.com - KCEN HD - Waco, Temple, and Killeen

(KCEN) -- New research reveals one in four tenth graders has smoked pot.

The data come from the National Institute on Drug Abuse which surveyed over 2,500 tenth grade students.

Thirty-five percent of the teens said they had drunk alcohol during the past 12 months and 19 percent had smoked cigarettes.

Researchers say teens who used multiple substances had higher rates of physical ailments, depression, anxiety and sleep problems.