Idea in Brief

The Situation

An increasing number of companies are using the E-liability carbon-accounting method as an important tool for tracking real progress toward reducing global emissions in their supply chains.

The Challenge

The E-liability system, however, excludes formal accounting for downstream emissions—those occurring after a company sells its products to immediate customers, for several good reasons.

The Principles

Certain companies are in fact accountable for disclosing downstream emissions generated by consumers’ use of their products. This article presents three principles for determining when companies should report downstream emissions, and it explains how and to what standards of reliability the company should disclose them.

Companies attempting to address climate change by decreasing their carbon footprints face the challenge of measuring how their operational, product design, and purchasing decisions affect the emissions generated in their supply chains. In a previous article, we introduced a robust carbon-accounting method (the E-liability system) for just this purpose. By applying this system, companies can produce environmental (or E-) ledgers of their own emissions—and those of their supply chains—that are as accurate, timely, comparable, and auditable as financial statements. An increasing number of companies are finding that the E-liability approach is an important tool for themselves, their customers, and other stakeholders in tracking real progress toward reducing global emissions in their supply chains.

A version of this article appeared in the July–August 2024 issue of Harvard Business Review.