carbon monoxide from cigarettes Carbonyls and Emissions Electronic Tobacco smoking - Wikipedia

This is not just a cigarette

They make a crackling noise as they burn and typically take longest time to smoke than conventional cigarettes

Writing in the journal Addiction , the researchers synthesize much of the evidence published to date on e-cigarettes, and suggest that use of these products can lead to reduced cigarette smoking overall with a potential reduction in deaths from cigarette smoking

Given the impact that smoking has on morbidity and mortality, smoking cessation is becoming a major focus among healthcare professionals, healthcare systems, and both state and federal governments

Besides that, many people find that it offers a mellowing effect on mood, and is even useful at bedtime