Non-smoking adults are at higher risk of lung cancer if their parents smoked.
According to the BBC, research suggests that passive smoking in childhood adds seven deaths to every 100,000 death of non-smoking adults annually.
The American Cancer Society conducted a research on 70,900 non-smokers.
The consequences resulting from passive smoking in childhood are carried on into adulthood. Adults whose parents smoked in their presence may develop chronic obstructive lung disease.