 Inhalation of asbestos fibres can lead to various serious lung conditions, including asbestosis and cancer.The material used in buildings can easily become friable, and the dust ends up resting on surfaces until disturbed by moving air around.When in an enclosed space, asbestos dust or fibres pose a legitimate health risk if the air is continually disturbed, as it may allow fibres to remain in the air for longer periods or even encourage more fibres to become airborne as the current airborne fibres become trapped in the victims lungs and are replaced by the phenomena of Brownian motion and the fan-disturbed air.