BANGOR - A majority of Maine residents - 79 percent - are nonsmokers, a statistic provided by the Smoke-Free Coalition of Maine on Thursday to local policy-makers, tenants and landlords to get them involved in making their public and private housing facilities smoke-free. The coalition's conference, attended by nearly 50 people, was designed to reduce the involuntary exposure of tenants to secondhand smoke, which can seep through ventilation systems, walls and electrical outlets. The coalition hosted a similar conference on Wednesday in Portland. Twenty-eight percent of Maine's housing is renter occupied, Jim Bergman, keynote speaker and co-director of Smoke-Free...