Canadian researchers
find that the pollution
levels outside of
office buildings
in Hong Kong where
smokers congregate
is 20 times higher
than the World Health
Organization's guidelines
for clean air, thus
posing a health danger
to passers-by.
http://www.monstersandcritics.com/news/health/news/article_1613946.php/Survey-Office-smokers-who-nip-out-for-cigarette-pose-health-risk
http://www.earthtimes.org/articles/news/363826,cigarette-pose-health-risk.html