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Second hand smoke contains several known carcinogens that are injurious to health. |
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Second hand smoke contains several known carcinogens and experts say that there is no safe level of exposure. So presence of second hand smoke, irrespective of its level in the air, is seen as a potential public health issue.
There is indeed a reason to be concerned about second-hand smoke levels in the air as the recent study and findings indicate serious health consequences.
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