Stone-quarry workers develop breathlessness — silicosis on X-ray; dust control ordered. Pneumoconiosis (dust lungs — silicosis: silica/quartz, egg-shell lymph nodes; asbestosis: shipyard, mesothelioma risk; byssinosis: cotton — Monday chest tightness; bagassosis: sugarcane): prevention is engineering (wet drilling, ventilation, masks) + periodic X-rays. Compensation via ESI/workmen's laws. The dust that feeds also chokes — control at source, not at lungs.