Stanford University researchers have found that a person who smokes just two cigarettes in a car releases particulates above government safety levels.
On the eve of the Labor Day holiday, the researchers advise people to not smoke in the car if they are heading off for a trip because it will expose their family members to those potentially harmful particulates.
"This is the most comprehensive set of measurements ever made of vehicle air change rates and smoke particulate levels in real driving conditions," said Neil Klepeis, a consulting professor of civil and environmental engineering. He is the co-author of a Stanford study published online in the Journal of Exposure Science and Environmental Epidemiology.
The study follows a similar effort published in June by Klepeis and fellow researchers about the dangers of second-hand smoke in outdoor settings. That study was almost immediately cited in debates about the dangers of outdoor smoking, said Wayne Ott, also a consulting professor of civil and environmental engineering.