New data from the nationally representative Monitoring the Future survey show marijuana use among college students has reached the highest levels in three decades. Notable, in 2017 4.4% of college students reported daily or near-daily marijuana use in the past month while 13.7% of same-age non-college students were daily users, a number that has doubled since 2006. Principal investigator John Schulenberg noted, “The brain is still growing in the early 20s, and the scientific evidence indicates that heavy marijuana use can be detrimental to cognitive functioning and mental health… Getting a foothold on the roles and responsibilities of adulthood may be all the more difficult for these one-in-eight noncollege youth who use marijuana on a daily or near daily basis. As for college students, we know from our research and that of others that heavy marijuana use is associated with poor academic performance and dropping out of college.” Read more.