Question: how do we filter air?
Answer: Increase Ventilation. Ventilating homes reduces moisture levels, a major problem for indoor air quality. ...  Beeswax Candles. Beeswax candles act as natural air purifiers. ...  Salt Lamps. A salt lamp is another great natural air purifier. ...  Activated Charcoal. ...  Houseplants. ...  Essential Oils.