The document summarizes the Globally Harmonized System of Classification and Labeling of Chemicals (GHS), which aims to standardize hazard communication for chemicals globally. It outlines the key elements of GHS, including a harmonized system for classifying chemicals and standardized labels and safety data sheets. It also discusses the Occupational Safety and Health Administration's proposed changes to the Hazard Communication Standard to align it with GHS, which will require employers to update training, labels, and safety data sheets.