In such cases, the person breathes with increased intensity and thus inhales more polluted air. Also consider what time of day you will be going outside if that decision is up to you. Concentrations during the day reflect diurnal changes in settlement conditions and the daily rhythm of population activity (heating, traffic intensity). The highest values ​​are in the morning and evening after sunset. Thus, the best conditions for airing and being outside are in the afternoon. Airing is necessary, although there is smog, but airing should be short-term, 3-4 minutes, and intense. Postpone work that worsens the air in the apartment and increases the need for ventilation, such as smoking, various work using paints, varnishes, adhesives, preparations with organic solvents, etc.