Schematic representation of the current evidence for the association of cadmium exposure with smoking-related lung disease including chronic obstructive pulmonary disease (COPD). Schematic representation of the current evidence for the association of cadmium exposure with smoking-related lung disease including chronic obstructive pulmonary disease (COPD). FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; GOLD: Global Initiative for Chronic Obstructive Lung Disease; BAL: bronchoalveolar lavage; GSSG: glutathione disulphide; GSH: glutathione; NF-κB: nuclear factor κ-light-chain-enhancer of activated B cells; ROS: reactive oxygen species. Koustav Ganguly et al. Eur Respir Rev 2018;27:170122 ©2018 by European Respiratory Society