There are thousands of chemicals in cigarettes, and just as many in cigarette smoke. In the smoke, you get polycyclic aromatic hydrocarbons which causes cancer, nicotine which is addictive, formaldyhyde which makes the tissue in your lungs harden, carbon monoxide which makes you out of breath, cyanide which can damage the lung cells. There are plenty of other nasty things in there on top of that.
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sciencetube145 commented on :
They sound worse than anything I have ever read! Thanks Iain!
Celine xx