If you are a smoker, consider what it does to your pet too. The risks associated with smoking and the dangers of secondhand smoke are no secrets. But now the focus is on third-hand smoke, residual tobacco smoke contamination that accumulates in indoor living spaces and on the hair, skin, clothing and personal effects of smokers. It’s now being recognized as a major contributor to the health risks of tobacco and indoor air pollution. Pets are very susceptible because they are walking and sleeping on such surfaces, and then lick their paws or put their toys in their mouths. The answer: Make your home environment completely smoke-free.