Marin’s teenagers are drinking “too early, too often and too much,” far above the state average, Kristen Law, a member of the county’s Health and Human Services team, said at a Tuesday meeting of the West Marin Coalition for Healthy Kids—a collection of school districts, youth and faith groups, healthcare professionals and others who have teamed up to address youth access to alcohol, drug and tobacco use. The coalition is taking a new approach, focusing…