This issue of Clinics in Chest Medicine, Guest Edited by Carrie A. Redlich, MD, MPH, Paul Blanc, MD, MSPH, Mridu Gulati, MD, and Ware Kuschner, MD, will focus on Occupational and Environmental Lung Diseases, with article topics including: asthma, hypersensitivity pneumonitis, and other immune-mediated lung disease; Work-exacerbated asthma; Occupational COPD; Indoor fuel exposure and the lung in both the developed and developing worlds; New (and newly recognized) occupational and environmental causes of selected chronic parenchymal and terminal airway diseases; Occupational rhinitis and other work-related upper respiratory tract conditions; Military service and lung disease; Ambient air pollution; Protecting the lungs from microbes, particles and other inhalational exposures; and Exhaled breath and induce sputum analysis in assessing the effects of occupational and environmental exposures.