Which organization’s guidelines relate to the use of environmental marketing claims?

The Federal Trade Commission (FTC) is responsible for establishing guidelines that govern environmental marketing claims, often referred to as "green claims." The FTC's Green Guides provide a framework for marketers to ensure their claims are truthful and not misleading to consumers. These guidelines help businesses understand how to substantiate their environmental claims and promote transparency in environmental communications. The focus is on preventing deceptive advertising practices, encouraging authenticity in eco-friendly claims, and ensuring that consumers are adequately informed about the environmental benefits associated with products or services.

The other organizations, while they may focus on aspects of environmental practices or reporting, do not specifically set guidelines for marketing claims in the same way that the FTC does. For instance, the EPA primarily regulates environmental protection and enforcement of laws related to the environment, the ISO develops international standards that may include sustainability measures but not marketing guidelines, and the GRI provides frameworks for sustainability reporting rather than marketing practices. Thus, the FTC is the correct organization related to environmental marketing claims.