Pattern of marijuana use during adolescence may impact psychosocial outcomes in adulthood

"Though the results do not show a direct causal link, it's important to note that even though most people think marijuana isn't harmful, it may have severe consequences for some people's functioning, education and mood," Forbes said. "While that may seem unimportant at age 20, the level of education you receive will likely have a huge effect on your quality of life and socioeconomic status later in adulthood."