Coaldust is....

Dark brown odorless dust that is created by crushing , grinding , or pulverizing coal.

Some of the ways you can get exposed to coaldust ,is the mining and moving of coal or during the crushing, grinding, or pulverizing of coal. Coal dust gets into your body by breathing it or having it come through your eyes or your mouth.

When you get exposed to coaldust you cough, wheeze, and get short of breath.If you are exposed for a long period of time you get bronchitis, emphysema, or pneumoconiosis and black lung disease.