Tell them that it's bad for his or her pet.
That is the conclusion of a study published by Tobacco Control.
An article on the Los Angeles Times Web site said research done by the Center for Health Promotion and Disease Prevention at the Henry Ford Health System in Detroit found more than one-quarter of smokers said knowing that smoking was bad for their pets would motivate them to give it up.
"Secondhand smoke is as dangerous for pets as it is for the non-smoking people who live with smokers. Non-smokers who live with smokers have to worry about the risk of lung cancer and respiratory diseases. But even dogs and cats exposed to secondhand smoke have an increased risk of lung cancer, allergies, eye and skin diseases and respiratory problems."And they can't just get up and leave when you light up.