Incense and candles release substantial quantities of pollutants that may harm health, a detailed new study of air quality in a Roman Catholic church suggests.
Even brief exposure to contaminated air during a religious service could be harmful to some people, says atmospheric scientist Stephan Weber of the University of Duisburg-Essen in Essen, Germany. A previous study in the Netherlands indicated that the pollutants in smoke from incense and candles may be more toxic than fine-particle pollution from sources such as vehicle engines.
Numerous studies have examined the health effects of combustion by-products from major outdoor sources, such as automobiles and power plants. Researchers have also examined some sources of indoor pollu