What is the impact of excessive moisture on indoor air quality?

Excessive moisture in indoor environments significantly contributes to the deterioration of air quality. When moisture levels are high, it creates a conducive environment for mold growth. Mold spores can easily become airborne, and when inhaled, they can lead to various respiratory issues, including asthma and allergic reactions. Additionally, elevated humidity can encourage the proliferation of dust mites and other allergens, further aggravating respiratory problems and affecting overall indoor air quality.

In contrast, options like improved air quality and no significant impact fail to acknowledge the serious health risks associated with high moisture levels. Similarly, while increased indoor temperature can sometimes be a byproduct of certain humidity issues, this relationship does not directly address the core impact of moisture on air quality. Thus, the answer correctly identifies the primary concern linked to excessive moisture: its role in promoting mold growth and the associated health effects.