EcoSolutions Inc., a multinational corporation, has been diligently tracking and reporting its greenhouse gas (GHG) emissions in accordance with ISO 14064-1:2018 for the past five years. Their annual GHG inventory covers all Scope 1, Scope 2, and a portion of Scope 3 emissions, focusing primarily on energy consumption and direct transportation. The reports are verified annually by an accredited third-party verifier and are used for mandatory reporting to regulatory bodies. Recently, EcoSolutions launched a new line of eco-friendly products, marketed as having a significantly lower carbon footprint compared to competitors. However, a group of investors has expressed concern, stating that the current GHG inventory does not provide sufficient detail to assess the actual environmental impact of the new product line. They require specific data on the emissions associated with the manufacturing, distribution, and end-of-life disposal of these products to make informed investment decisions. Despite the company\'s existing comprehensive GHG reporting, the investors argue that the information is not useful for their specific needs related to evaluating the sustainability of the new product line.\n\nBased on the scenario and the principles of ISO 14064-1:2018, which principle is most directly challenged by the investors\' concerns regarding the existing GHG inventory?