Finally, despite comprising only 3.5% of global areas, Extremely high densitie, i.e., hotspots, were identified across several countries, underscoring the global scale of this issue and facilitating the identification of global hotspots

The Cleveland Clinic (CC) just published an egregiously misleading article titled, Vaping and Smoking: Both are Dangerous, Nicotine in any form is hazardous to your health. The 2007 British Royal College of Physicians report, Harm Reduction in Nicotine Addiction: Helping People Who Can't Quit, was unequivocal: that smokers smoke predominantly for nicotine, that nicotine itself is not especially hazardous , and that if nicotine could be provided in a form that is acceptable and effective as a cigarette substitute, millions of lives could be saved ( emphasis added) Despite the established science, the CC asks: But how do e-cigarettes and cigarettes really stack up when it comes to your health? They dont provide a straight answer, but in its 2016 report the Royal College did: the hazard to health arising from long-term vapour inhalation from the e-cigarettes available today is unlikely to exceed 5% of the harm from smoking tobacco . ( emphasis added)

But have you ever wondered what the real reason is for a person getting addicted to smoking? 
Without food, electricity, water, or heat a slow death was imminent for all of mankind
It works by trapping and filtering out odor-causing molecules present in the air