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March 2010

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Monday, March 08, 2010

THIRD-HAND SMOKE

from Proceedings of the National Academy of Sciences

After years of hearing about the dangers of second-hand smoke, get ready for “third-hand smoke.” This is the term applied to the result of tobacco smoke residues found on everyday surfaces reacting with common elements in indoor air to form potent cancer-causing chemicals known as nitrosamines. Researchers at Berkeley National Laboratory say one of their experiments involved the interior of a smoker’s truck. Nicotine residues combine with the common indoor air pollutant, nitrous acid, to form tobacco-specific nitrosamines. They say the most likely human exposure to nitrosamines occurs from contact, such as clothes, skin, furniture and dust, making infants and young children more likely to receive higher exposure than adults. Their report appears in the Proceedings of the National Academy of Sciences.

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