What factor is commonly a cause of disturbances to asbestos-containing materials (ACM) in schools?

Vibration is a significant factor that can disturb asbestos-containing materials (ACM) in schools because it can physically loosen or displace the materials. When structures experience vibrations from various sources, such as construction activities, nearby traffic, or even heavy use of certain equipment within the school, this can lead to the integrity of ACM being compromised. These materials can release asbestos fibers into the air, posing a health risk to those in the vicinity.

In contrast, while temperature changes, humidity, and airflow can influence the condition of asbestos materials to an extent, they typically do not cause immediate physical disturbances in the same direct manner as vibration. Temperature changes can affect the physical properties of materials, potentially leading to cracking or weakening over time, but the immediate risk associated with vibration can more directly disrupt the material's integrity.