Now, a growing number of scientists are raising the alarm about thirdhand smoke — residual chemicals left on indoor surfaces by tobacco smoke. One study published this year showed thirdhand smoke increased risk of lung cancer in mice. But after a battery of tests, they were surprised to find signs pointing to nicotine and tobacco smoke residue. But the idea of thirdhand smoke began to emerge only in the past decade. The American Academy of Pediatricians has issued recommendations to limit children's exposure to thirdhand smoke.

Source: Washington Post May 09, 2018 18:02 UTC