The Johns Hopkins Medicine webpage on occupational lung diseases provides an overview of lung conditions caused by exposure to harmful substances in the workplace. It explains various types of occupational lung diseases, including asbestosis, silicosis, coal workers' pneumoconiosis, and hypersensitivity pneumonitis. The page outlines common symptoms such as chronic cough, shortness of breath, and chest tightness. It emphasizes the importance of early diagnosis and effective treatment to manage symptoms and prevent disease progression. Additionally, the webpage highlights preventive measures, including workplace safety practices and protective equipment, to minimize the risk of exposure.