When well-funded, youth substance abuse prevention programs work. We don't need to look further than the Washington State Tobacco Prevention and Control Program which has contributed to a 50% reduction in youth smoking rates since 2000. According to an article in the Wall Street Journal, public health expert fear that funding reductions will undermine the progress states have made in reducing tobacco use.
"A study led by Staci Ann Gruber of Harvard Medical School found that people who began using marijuana before age 16 and who used it the most performed the worst on a test of cognitive flexibility. Cognitive flexibility means being able to change your response to something based on the context of the situation."