Child passive smoking 'increases chronic lung risk'

Non-smoking adults have a higher risk of dying from serious lung disease if they grew up with parents who smoked, according to US research.
The researchers said childhood passive smoking was "likely to add seven deaths to every 100,000 non-smoking adults dying annually".
The study of 70,900 non-smoking men and women was led by the American Cancer Society.
Experts said the best way to protect