ac unit smells like cigarette smoke How to eliminate odor from ventilation? Your Air Conditioner Smells Bad:

Breaking that cycle can be a key in changing the sabotaging attitude

The solutionand proper etiquetteis to simply rest your cigar in an ashtray and let it extinguish by itself when you are through with the smoke.

Smoking rates are at historic lows, and reducing nicotine content in cigarettes will not make these products less risky or improve public health, said Luis Pinto, vice president of corporate communications at Reynolds American, the maker of popular brands including Camel, Lucky Strike and Newport

Morris Coats, A Note on Estimating Cross-Border Effects of State Cigarette Taxes, National Tax Journal 48:4, (December 1995), 573-584, Mark Stehr, Cigarette tax avoidance and evasion , Journal of Health Economics 24:2, (March 2005), 277-297, [4] Shu Wang, David Merriman, and Frank Chaloupka, Relative Tax Rates, Proximity, and Cigarette Tax Noncompliance: Evidence from a National Sample of Littered Cigarette Packs, Public Finance Review 47:2 (March 2019), 276-311