Science Daily recently reported that University of Connecticut Health has been conducting studies on how teens who were dependent upon alcohol or marijuana and found that they not only had developmental effects in their teen years, they fared less well as adults.  They wrote, “Overall, individuals who were dependent on either marijuana or alcohol during their teen years achieved lower levels of education, were less likely to be employed full time, were less likely to get married and had lower social economic potential.”  For more information about results so far and the ongoing study, check out the summary here:   https://www.sciencedaily.com/releases/2017/11/171105193046.htm