Which factor is NOT typically linked to a rise in indoor air pollution in schools?

The choice of natural cleaning agents is typically linked to lower levels of indoor air pollution rather than a rise in it. Natural cleaning agents often contain fewer harsh chemicals compared to conventional cleaning products, which can release volatile organic compounds (VOCs) and other pollutants into the air. Their use can contribute to better indoor air quality, making them a preferable option in schools that are concerned about the health impacts of indoor air pollution.

In contrast, poor ventilation, the use of chemical products, and high occupancy rates are all associated with increased levels of indoor air pollutants. Poor ventilation can trap contaminants inside, making it difficult for fresh air to circulate and for pollutants to disperse. The use of chemical products frequently introduces VOCs and other harmful substances into the air, and high occupancy rates can elevate the concentration of allergens, carbon dioxide, and other pollutants due to more individuals contributing to the overall indoor air quality.