Admitting that this analysis was a short-term study as the time of exposure was very limited, and the concentration of metals was below the limits, the study said, it is believed that if the exposure duration is larger, then the concentration of metals would increase. It further said that more in-depth investigation should also be conducted in actual furnished rooms in a real apartment to evaluate the effects of smoke generated by smoking in an actual residential environment
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An Optical alarm is sensitive to large smoke particles
"There is no safe level of secondhand smoke exposure, and long-term exposure can increase the risk of many chronic conditions, such as coronary heart disease, respiratory disease and cancers," said lead author Ruixuan (Roxanne) Wang, a doctoral candidate in the College of Public Health and Health Professions at the University of Florida