What is a characteristic of buildings suffering from sick-building syndrome?

Buildings suffering from sick-building syndrome are characterized by very poor air quality, which can result from a variety of factors including insufficient ventilation, the presence of indoor pollutants, and moisture issues. Poor air quality can lead to a range of health symptoms among occupants, such as eye, nose, and throat irritation, headaches, dizziness, and fatigue. Such environments often occur in places where buildings are sealed tightly for energy efficiency, limiting fresh air circulation and increasing exposure to contaminants.

The other options do not accurately reflect the common characteristics associated with sick-building syndrome. While sick buildings can be found in various climates, their defining factor is not their location in cold regions. High windows do not inherently contribute to the health issues associated with sick-building syndrome. Additionally, advanced ventilation systems, rather than being a typical characteristic of sick buildings, would typically help to improve air quality and alleviate symptoms.