Final answer:
The likely problem causing greasy floors, doors that won't shut correctly, and haze in the air is a lack of ventilation, which leads to the buildup of indoor pollutants.
Step-by-step explanation:
If you are experiencing issues with greasy floors, doors that won't shut correctly, and haze in the air, the likely problem is lack of ventilation. These signs suggest that there isn't enough fresh air circulating to remove or dilute the indoor pollutants. Greasy floors can indicate a buildup of volatile organic compounds (VOCs), while a haze in the air could point to the presence of suspended particles, both of which are common indoor pollutants. Difficulty closing doors could be the result of humidity and possible mold issues, which are exacerbated by poor ventilation. Proper ventilation, such as opening windows and using exhaust fans, is crucial for maintaining good indoor air quality and preventing pollutant levels from becoming concentrated.