Joseph Halfey, a security officer at the Hollywood Casino in Kansas City, Kansas, loves his job but not the health risks that come with it.

Casinos are one of the last places in Kansas where smoking is allowed. The Kansas Indoor Clean Air Act, a 2010 law, banned most indoor smoking but included an exception for casinos. Hafley, who founded the advocacy organization Casino Workers Against Smoking Effects, said the smoke emitted from cigarette and cigar smoke sticks on his clothes, exposing his family to harmful toxins when he gets home. Each day he worries for his health and often feels sick after inhaling smoke all day, he said.