Which ISO standard is associated with Environmental Labels and Declarations, specifically for self-declarations?

The correct answer is ISO 14021, as this standard specifically addresses self-declared environmental claims made by organizations regarding their products or services. This standard outlines the principles for creating such declarations, ensuring they are accurate, credible, and transparent to stakeholders. ISO 14021 focuses on various aspects of environmental labels and declarations, including criteria for their development and guidelines to assure their reliability.

In contrast, ISO 14040 pertains to the principles and framework for conducting life cycle assessments (LCA), which is a different concept and not focused on self-declaring environmental claims. ISO 21930 is relevant to sustainability in building products but does not specifically deal with self-declarations. ISO 14025, while also within the realm of environmental declarations, primarily relates to Type III environmental declarations, which require third-party verification, differing from self-declarations outlined in ISO 14021.