By Contributor, Mary Ryan For Gen Z, Millennials and even the youngest Generation Xers, the concept of smoking in the workplace, restaurants, gyms, malls, movie theaters, airplanes or any public place is almost inconceivable. As recently as the 1990s, however, nearly all businesses still allowed smoking indoors despite evidence that both first and secondhand smoke cause cancer, emphysema, asthma and numerous other illnesses. Smoke also played a huge role in poor indoor air quality in commercial buildings, which has been linked to employee dissa…