Marijuana interferes with brain development and exacerbates mental health conditions. The developing adolescent brain is not matured until well beyond early twenties. Early use of marijuana can alter the structure and function of the brain, harm learning, critical thinking and memory development and contribute to mental health issues, not to mention medical problems.
Legalizing marijuana is expected to increase the number of people who use the drug, it is also likely to increase the number of people who develop a marijuana use disorder. Adolescents are more vulnerable to dependency on marijuana, therefore prevention of early onset of use is critical