Experts have raised concerns about the dangers of so-called third hand smoke is used to describe chemicals that remain when a person has been smoking.

Toxic dust that settles onto surfaces and harmful volatile compounds that disperse in the air from materials that comprise particles clinging to smokers' hair, clothing, personal belongings, and just about anything else and it's particularly hazardous for children.

According to a study conducted by the Massachusetts General researchers, which was published in the journal Pediatrics, most smokers and non-smokers know the dangers of first and second hand smoke.

Only about 65 percent of non-smokers and 43 percent of smokers agreed with the statement that breathing air in a room today where people smoked yesterday can harm the health of infants and children.

Children are especially susceptible to third hand smoke exposure because they breathe near, crawl and play on, touch and mouth contaminated surfaces.

Joel Africk, president and CEO of the Respiratory Health Association of Metropolitan Chicago, said that the Pediatrics study did not call for legislation that would ban smoking in private homes instead this is a reminder to all smokers and non-smokers.