That's the finding of study in the journal Addiction. It determined regular exposure to secondhand smoke has a negative effect on brain function.
According to recent reports by the World Health Organization, exposure to secondhand smoke can have serious consequences on the health of people who have never smoked.
Non-smokers who were exposed forgot almost 20 percent more in the memory test. Smokers performed the worst of all, forgetting 30 percent in the memory test.
Scientists say they hope their study will further research into the effects of secondhand smoke.