Silicosis is caused by the inhalation of crystalline silica dust, which is present in many types of rocks.

McNeill was not given any form of protection from the dust, which can cause lung cancer, tuberculosis, kidney disease and chronic obstructive pulmonary disease.

New national laws that take effect today give workers the right to demand multiple safety control measures, such as PPE, water suppression, on-tool extraction systems and local exhaust ventilation systems.