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I would say "not familiar" or "hidden" but not "Unknown". Here are some:
There is enough nicotine in four or five cigarettes to kill an average adult if ingested whole. Most smokers take in only one or two milligrams of nicotine per cigarette however, with the remainder being burned off.
Hydrogen cyanide one of the toxic byproducts present in cigarette smoke, was used as a genocidal chemical agent during World War II.
There is enough nicotine in four or five cigarettes to kill an average adult if ingested whole. Most smokers take in only one or two milligrams of nicotine per cigarette however, with the remainder being burned off.
Secondhand smoke contains more than70 cancer-causing chemical compounds,11 of which are known to be among high cancergenous agents.
Every eight seconds, a human life is lost to tobacco use somewhere in the world. That translates to approximately5 million deaths annually.
Tobacco use decreases the fertilization rate & sexual desire.
Somkers often lose their smell sense.
