Companies have been attracting a lot of headlines lately by adopting new policies that prohibit the hiring of smokers. Proponents of these policies recite a number of benefits for the organization and the workforce, including promoting employee health, lowering health insurance costs and improving employee productivity.

Among the employers adopting these policies have been Humana, Geisinger Health System, Alaska Airlines and Union-Pacific Railroad. An estimated 6,000 companies across the country refuse to hire smokers.