[passage-header]Read the excerpt and answer the question that follows:[/passage-header]
Smoking tobacco is probably one of the worst habits humankind has developed. Originating as a tradition of the Native Americans, practiced mostly on special occasions, smoking has gradually become a kind of mass addiction. Due to the efforts of tobacco companies seeking to increase their sales, people started smoking more and more often; the evolution of a more traditional pipe to a cigarette took some time, but eventually tobacco became more affordable and easier to use (you now simply need to light it up, instead of having to always carry a tobacco pouch, stuff a pipe, puff it, and so on). As a result, deaths and health issues connected to tobacco consumption became a worldwide concern.
A popular belief is that it is nicotine that kills. It is only partially true: although nicotine does harm ones health (mostly affecting the cardiovascular system), it is the tar, carbon monoxide, hard particles contained in cigarette smoke, and a bunch of toxic emissions and heavy metals that deal the most damage. Nicotine causes addiction, and the smoke does the rest.
Nowadays, there are alternatives to analogue tobacco smoking: the widely popular electronic cigarettes. Although it is hotly debated whether e-cigarettes are harmful to smokers health or not, it is hard to argue that substituting cigarettes with these devices does more good than bad, since they possess a number of advantages that cannot be neglected easily. And whereas smoking still remains a dangerous and unacceptable addiction, e-cigarettes might be a decent way to break free of it.
Electronic cigarettes deliver nicotine to a smoker not through burning (which obviously implies inhaling harmful and toxic smoke), but through the evaporation of nicotine-containing liquids. An e-cigarette heats up the liquid in a special container called an atomizer; the liquid evaporates, and through this vapor a smoker receives their dose of nicotine. Thus, the process of nicotine consumption in this case should be called vaping, not smoking. These liquids usually comprise glycerol, propylene glycol, ethylene glycol, propanediol, and some other components (NCBI). Although some of them are not completely harmless, the chemical composure of e-cigarette liquids is definitely safer than the one of a regular cigarette. However, thorough control over the composure of these liquids should be established, and the usage of such components as ethylene glycol and propanediol should probably be banned. Still, if a smoker does not plan to quit, he or she might want to consider using e-cigarettes instead of real tobacco.
Another good reason for a smoker to start using e-cigarettes is that the aforementioned liquids can contain different amounts of nicotine. A heavy smoker might want to start vaping using liquids containing up to 24 milligrams of nicotine, and the good news for them is that it is possible to gradually decrease the dose until zero milligrams are present.
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