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A cheap purifier with expensive, frequently replaced filters can cost more than a premium unit with long-lived filters

Following the rates of death from respiratory diseases in the decade prior to 2002 and the decade after passage of the Clean Smokestacks Act, we observed a marked reduction in deaths in North Carolina due to asthma, emphysema and pneumonia associated with a reduction in levels of air pollutants

Metals present in e-cigarette parts can also transfer to the aerosols that users inhale

Nicotine concentrations with electronic cigarette use: effects of sex and flavor

Food and Drug Administration says it's unclear whether e-cig users are inhaling potentially harmful chemicals

However, ease of use, availability, flavoring, advertising and lack of a strong smell have actually made it easier for both adults and teens to start or continue on the path of nicotine dependence