Indoor Air sciences CSMI Practice Exam

Which property makes mold beneficial in the environment?

1. Being pathogenic

2. Decomposing organic matter

3. Foliage production

4. Producing toxins

The correct answer is: Decomposing organic matter

Mold plays a crucial role in the ecosystem primarily due to its ability to decompose organic matter. This decomposition process is vital for nutrient cycling, as molds break down dead plant and animal materials, returning nutrients to the soil which can then be utilized by other organisms. This natural recycling of nutrients supports plant growth and helps maintain the balance of various ecosystems. Understanding this function is important because it highlights the ecological significance of molds beyond their potential negative effects on indoor air quality and health. While some molds can be pathogenic or produce toxins, their beneficial role in breaking down complex organic materials showcases their integral part in environmental sustainability. This duality in their role emphasizes the need for a balanced perspective when considering molds in different contexts, such as natural environments versus indoor settings.