When ACMs are disturbed or broken they can release harmful fibres into the air which can be breathed in by anyone nearby.
Asbestos fibres within the body cannot be broken down by the body's natural defences.
ACMs in good condition and left undisturbed cannot cause ill health.
The greater the disturbance of ACMs and the longer the duration of the disturbance, the greater the risk to health and safety.
Smokers exposed to asbestos are 10 times more likely to develop lung cancer than non-smokers.