WHY IT MATTERS: If you are a parent or caregiver, this research suggests that community-wide shifts in cannabis availability and cultural acceptance directly influence the likelihood that your teen encounters heavier use patterns, making household conversations about cannabis more important than ever. CLINICAL OVERVIEW: New research from Sweden suggests that adolescent cannabis use follows the same population-level consumption patterns as alcohol, meaning that when overall use rises in a population, heavy use rises disproportionately among the most vulnerable youth. This finding has important clinical implications because it reinforces that broad prevention strategies targeting overall youth substance exposure, rather than solely focusing on individual high-risk teens, may be the most effective approach to reducing problematic cannabis use in adolescents.