True, and it can easily be exposed and made airborne by by accident. For example, many HVAC professionals are unaware or unconcerned about the asbestos fiberbo

True, and it can easily be exposed and made airborne by by accident. For example, many HVAC professionals are unaware or unconcerned about the asbestos fiberboard panels that were often packaged around register boxes until the 70's. These boards are fragile and will readily shed fibers into the air. Same goes for old ceiling panels, often loaded with friable asbestos. An act as simple as drilling a hole, or installing new can lights can load up the room with airborne fibers if done carelessly.