A new study found that children who are forced to inhale secondhand smoke are more likely to grow up to be aggressive and antisocial, the Daily Mail reported May 21. The study shows that for children under the age of 10, even a short period of secondhand smoke inhalation can have a permanent effect on their mental development. The study was conducted by Linda Pagani, Ph. The study was conducted by Dr. Linda Pagani and Dr. Carolyn Fitzpatrick of the University of Montreal. The study was conducted by Dr. Linda Pagani and Dr. Carolyn Fitzpatrick of the University of Montreal. Writing in the Journal of Epidemiology and Public Health, Dr. Pagani said, “Children’s exposure to tobacco is very dangerous because their brains are still developing.” Whether the child’s mother smoked during pregnancy and whether the parents had a history of antisocial behavior did not affect the study’s results. Dr. Pagani said the study used data on 2,055 children from birth to age 10, including parental smoking and reports of classroom behavior made by teachers. Previous studies have had difficulty involving families at the bottom in follow-up over time, so the resulting data is less than accurate.