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 …

Read More

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 …

Read More

Is Scope 3 fit for purpose? Alternative GHG accounting frameworks for inventories and intervention impacts

October 28, 2024, by Derik Broekhoff & Michael Gillenwater

Preface This post continues a series (“what is greenhouse gas accounting?”) exploring conceptual issues in corporate greenhouse gas (GHG) accounting. If you have not read the series, all installments are …

Read More

a-pile-of-garbage-sitting-next-to-a-street-light

Which methane GWP value do I use? And which value should not be used?

October 17, 2024, by Michael Gillenwater & Alissa Benchimol

Carbon dioxide (CO2) is the primary greenhouse gas (GHG) causing long-term atmospheric emissions and climate change and therefore is a primary target for mitigation action. Methane (CH4) and other non-CO2 …

Read More

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 …

Read More

Smoke stack

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

April 2, 2024, by Michael Gillenwater

Are corporate Scope 3 emissions far greater than Scopes 1 or 2? The short answer is that the question is meaningless because the Scope 3 does not measure anything that …

Read More

What is GHG Accounting? Market-based mistake

January 31, 2024, by Michael Gillenwater

Installment N.4 Preface This installment extends the discussion from installment N.3 on emissions allocation in GHG inventories. Unfortunately, you will need to read the prior installments in this “What is …

Read More

E-liabilities: a fresh or fantasy proposal?

January 31, 2024, by Michael Gillenwater

What do you get by mashing together ideas from corporate cost accounting with dreams of a universal carbon pricing mechanism and try to apply it through sustainability disclosures of corporate …

Read More

What is Greenhouse Gas Accounting? Turning Away from LCA

December 19, 2023, by Michael Gillenwater

Installment N. -1   Preface This installment can be considered equivalent to a movie prequel that provides the “backstory” for the other installments in the “What is GHG Accounting?” series. …

Read More

What is GHG Accounting? Further Thoughts on Responsibility & Causation

November 20, 2023, by Michael Gillenwater

Installment N.3 bis Preface This installment supplements the previous installment on emissions allocation. Here I address two conceptual hurdles that you may be struggling to jump over—responsibility and causation. Understanding …

Read More