Which system indicates the presence of hazardous materials worldwide?

The Globally Harmonized System (GHS) is the correct answer as it serves as an international standard that provides consistent criteria for classifying and labeling hazardous chemicals, ensuring that people worldwide can effectively recognize the presence of hazardous materials. The GHS creates a universal language for hazard communication, enabling consistent identification of chemical hazards through standardized symbols and labels.

With the GHS in use, countries around the globe can follow these guidelines to ensure that safety information concerning hazardous materials is conveyed clearly and effectively, thus enhancing safety during the handling, transportation, and emergency response situations involving these materials. This system is particularly beneficial as it facilitates international trade and communication concerning hazardous substances.

In contrast, the National Fire Protection Association (NFPA) focuses on safety standards and codes to reduce fire risks and enhance emergency management within the United States. The Hazardous Materials Identification System (HMIS) is primarily used in the U.S. to communicate hazards on a local level, and its implementation can vary by organization. The Emergency Response Guidebook (ERG) provides guidance for first responders at hazardous materials incidents, but it does not serve as a universal identification system like the GHS does.