menthol electronic cigarettes e-cigarettes to be sold in US FDA's proposed ban on menthol

reduced mucus production in lungs

Lets review the sequence in the context of smoking cigarettes (although its the same for any tobacco product)

Lorillard Tobacco Company promoted the Micronite filter on its Kent cigarettes, made of a material so safe, so pure, its used to filter the air in many hospitals. This material was blue asbestos, also known as crocidolite, the Inhalation of which can cause lung cancer, mesothelioma (cancer of the lining of the lung), and debilitating chronic lung disease

The H13 True HEPA triple-layer filtration captures 99.97% of airborne pollutants, and lab testing confirmed it cleans 250 ft every 15 minutes for a total hourly coverage of 1,076 ft