Scientists at San Diego State University in the United States (US) said thirdhand smoke, the poisonous residue from smoking, can linger in casinos on walls, furniture, and in carpets months after smoking is eliminated.
The lead author Georg Matt said, “Casinos are unusual environments because of the amount of smoking that takes place 24/7 over long periods of time.
“Over years of smoking, layers of smoke residue stick to surfaces and penetrate deep into materials.”
The researchers studied the results of a smoking ban in a Northern California casino. They found that even though thirdhand smoke declined significantly after the ban, toxic tobacco smoke residue remained at levels higher than found in hotels or private homes with smoking bans.
These chemical residues, such as nicotine, cotinine and the potent lung carcinogen known as NNK, can harm people’s health when they’re exposed to them, even if they aren’t smokers themselves.
Only by intensive surface cleaning — and in some cases replacing surfaces entirely — can casinos hope to make their environment significantly safer for its guests after imposing a smoking ban, Matt said.-
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