Michael Gillenwater, Author at GHG and Carbon Accounting, Auditing, Management & Training

Limitations of Hourly Matching Claims for Scope 2 Reporting

May 30, 2025, by Michael Gillenwater

Introduction Electricity is an unusual commodity, as its production and consumption occur simultaneously. Unless generated on-site, electricity is pooled within the transmission and distribution grid, where it “mixes” before being …

This image depicts the GHG Protocol's Scope 3 emission source categories for corporate inventory reporting.

What is GHG Accounting? Toward comparability by fixing the Scope 3 boundary problem

May 27, 2025, by Michael Gillenwater

Installment N.6 Introduction This post continues our “What is Greenhouse Gas Accounting?” series, which explores fundamental questions in corporate greenhouse gas (GHG) accounting. If you have not read the series, …

What is an “emission reduction”? And when should you avoid saying “reduced”?

January 21, 2025, by Michael Gillenwater

Click here to download a PDF of this article Introduction Collectively as GHG professionals, we are confused about what an “emission reduction” is. This confusion is interwoven within several of …

The differences between allocational and consequential greenhouse gas accounting —Summarized

January 17, 2025, by Michael Gillenwater

Click here to download a PDF of this article Introduction For the last few years, through our writing and teaching, the Greenhouse Gas Management Institute has been spreading and elevating …

GHG Protocol Announces Members of Technical Working Groups

September 27, 2024, by Michael Gillenwater

GHG Protocol has announced the members of the Technical Working Groups that will aid in revising and updating the corporate standards suite. This announcement comes on the heels of a …

Submit a Manuscript to the Carbon Management Journal

September 10, 2024, by Michael Gillenwater

Submit a manuscript to the Carbon Management journal for an Article Collection on The GHG Protocol Revision Process. The GHG Protocol is currently undertaking a process for updating its suite of corporate …

Do we need a paradigm shift on offsetting? Compensation to contributions

July 13, 2024, by Michael Gillenwater

The problem of compensatory net zero At the moment, “net zero” is about as popular a fad as we have ever seen in the climate space.[1] Before that there was …

Line of Electric Post Near Concrete Building

Scope 3 GHG Accounting for Electric Companies and Combined Utilities: A Compendium of Technical Briefs

July 3, 2024, by Michael Gillenwater

GHGMI and the Electric Power Research Institute (EPRI) hosted a series of webinars and published accompanying technical briefing papers focused on GHG accounting of scope 3 emission sources for a …

Corporate Power Purchase Agreements: A Policy Perspective

April 2, 2024, by Michael Gillenwater

“The market for power purchase agreements (PPAs) has exploded in the last decade due, in part, to non-utility entities (e.g., corporations) attempting to meet greenhouse gas (GHG) emission reduction targets. …

Myth busting – Are corporate Scope 3 emissions far greater than Scopes 1 or 2?