Keeping doors and windows closed and using air purifiers with high-efficiency particulate filters (HEPA) can help further filter out smoke particles indoors
2 to 3 tactically installed plants in smaller rooms can make substantial advantages
As reported by the US Surgeon General in 2006 and affirmed in 2024, there is no risk free level of secondhand smoke exposure and 100% comprehensive smokefree laws that apply to all emissions in all places including workplaces, restaurants, bars, and casinos have the greatest public health impact

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Kroening, P
E-liquids contain their nicotine content in milligrams per milliliter (mg/ml)