Non-smokers exposed to passive smoking by colleagues could have their lung function reduced by as much as 10 per cent, according to a study published in the journal Occupational and Environmental Medicine. Researchers at the University of Dundee, in Scotland, discovered that passive smoking at home and in public places had different impacts. The scientists studied the records of 300 men and women from Glasgow who had never smoked, and questioned them about their exposure to tobacco smoke. It was discovered that the higher the level of exposure, the lower the level of lung function. Author of the report, Dr Ruoling Chen, claimed that passive smoking in the workplace had the biggest impact because the majority of people spend most of their day at work. Anti-smoking campaigners have welcomed the study, and called upon the government to increase protection for workers against passive smoking.