Smoking is very injurious to health as it leads to several consequences including deadly cancer. The least effect of the smoking from secondhand smoke actually is yellowing of teeth.
Secondhand smoking is also called as passive smoking in which the individual is not actually smoking but is near the source of tobacco smoke.
The side-stream smoke is far more toxic as compared to mainstream smoke.
Secondhand smoking is not done by the person but the exposure of the smoke is harmful.
Thus, yellowing teeth are not the consequence in case of passive smoking.
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