how does tobacco affect your lungs Effects of smoking on File:Tobacco diagram.png - Wikimedia Commons
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In essence, the Dyson took a dangerous value to the high end of my normal range: if I have 4-5 people in my office space for an hour or so, Ill see a high of around 20

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Chew, dip, snuff, chaw or whatever you want to call it is dangerous and addictive
published a study linking smoking with heart disease and lung cancer