Secondhand smoke takes a sizable toll on Americans’ health and productivity, particularly among black Americans, according to a recent study by researchers at the University of California San Francisco (UCSF). Mining data collected between 2003 and 2006 by large government surveys, the researchers calculated that secondhand smoke kills 42,000 Americans each year, including nearly 900 infants. Secondhand smoke is linked to some of the same fatal illnesses caused by smoking, including heart and lung disease, and in babies, low birth weight, SIDS (sudden infant death syndrome) and respiratory distress syndrome. Overall, the researchers found that yearly deaths from secondhand smoke accounted for about 600,000 years of potential life lost, or an average of 14.2 years per person. The price tag for that lost productivity loss equaled $6.6 billion in total — about $158,000 per death.