Wood smoke from residential fireplaces as bad as cigarette smoke

As reported in an article in the SF Chronicle, the Bay Area Air Quality Management District is considering a ban on residential wood-burning on nights with poor air quality. From the article: "Spurred by growing evidence that shows smoke from wood-burning is as bad or worse than smoke from cigarettes, the Bay Area Air Quality Management District is trying to reduce the amount of harmful particulate matter that people breathe. Children, the elderly and those with respiratory illnesses are particularly susceptible to smoke particles that emanate from wood-burning fireplaces."