The earlier someone starts using substances, the greater their chances of developing an addiction. For example, 90% of people with a substance use disorder began using drugs and alcohol before the age of 18. This means that age matters. To help solve for this problem, the coalition  implement strategies that (1) limit access to substances; (2) change the culture and context within which decisions about substance use are made; and/ or (3) shift the consequences associated with youth substance use. Evidence exists that implementing this comprehensive approach at the local, state, and national levels can reduce community-level alcohol, marijuana, tobacco, opioid, and other drug problems.