São Paulo Study Shows Passive Smokers with Elevated CO Levels
Friday, February 20th, 2009A recent study conducted by São Paulo State (SP) Secretary of Health (SES) found that 35.9% of non-smokers regularly exposed to tobacco smoke have carbon monoxide levels in them comparable to those found in smokers. The study looked at 1,310 persons during smoking prevention actions promoted by SES during 2008 in open-air environments, such as […]