New report out today: Electricity Demand Growth and Data Centers: A Guide for the Perplexed

We've converted Koomey.com to use Ghost, an open source blogging/newsletter software

Our new report on digital twins for data center operations, out today!

Our new article in Joule titled "To better understand AI’s growing energy use, analysts need a data revolution" was published online at Joule today

KQED Forum today about our digital carbon footprint

If you think new electricity load growth is a crisis, think again

Our Nature commentary on AI scenarios, out today

I appeared on the Shift Key Podcast on April 3, 2024, talking about electricity used by AI and ICT, with a focus on load forecasts

An updated vignette of technology change for lighting

The 8th annual roundup episode of Chris Nelder's Energy Transition show

Our commentary titled “Abandon the idea of an ‘optimal economic path’ for climate policy” came out on July 2nd, 2023 in WIRES Climate Change

I participated in a symposium on Technology and Global Change at Oxford last week

We talked with Allyson Klein at Tech Arena for her June 23rd podcast about our book, Solving Climate Change

Questions that came up at our webinar about our book, Solving Climate Change: A Guide for Learners and Leaders

Our latest book, Solving Climate Change, freely downloadable through May 21, 2023

My talk at the Salinas, CA Rotary Club on Feb 9, 2023, focused on misconceptions about information technology energy and environmental impacts

Our commentary on the need for targeted programs affecting networked standby power for information technology

Our latest book, out today: Solving Climate Change: A Guide for Learners and Leaders

Our latest article on scenario decomposition tools was published in September 2022

My visit to Bletchley Park and The UK Computing History Museum in November 2017

Our new article published today in Joule: “Does not compute: Avoiding pitfalls in assessing the Internet's energy and carbon impacts”

I gave a virtual keynote today for the iTherm 2021 technical conference, focusing on misconceptions about electricity use and emissions associated with computing

I gave a virtual talk today for the Organization for Security and Co-operation in Europe and the World Energy Council on the role of  ICT in the energy transition

An Update On Trends In US Primary Energy, Electricity, And Inflation-Adjusted GDP Through 2019

A fun science project: A simple cloud chamber!

An old (2012) story with lessons that are still important today

Our article on changes in data center electricity use from 2010 to 2018, out in Science Magazine today

Our analysis of supercomputer efficiency over time

Go ahead and watch a movie on Netflix!

I discovered a hidden gem in Palo Alto today

Dashboards of key drivers for the recently released IEA Sustainable Development Scenario (SDS)

Our summary of the driving forces behind the 2017 IEA “Beyond 2 degrees” (B2DS) scenario

A look at historical global trends in energy and emissions

A quick investigation of solar PV projections in the International Energy Agency’s World Energy Outlook

The importance of standardized utility rate data for energy innovation

A vignette of technology change for lighting

My annual appearance on the Energy Transition Show podcast was just posted

A wonderful summary of the climate problem

My new report: Estimating Bitcoin Electricity Use: A Beginner’s Guide

An Update On Trends In US Primary Energy, Electricity, And Inflation-Adjusted GDP Through 2018

Review of Turning Numbers into Knowledge from the Midwest Book Review

Talking Sense About Bitcoin Electricity Use

Our analysis of the electricity intensity of networks came out in printed form in August 2018, now with a full reference

Google’s new white paper on clean energy for their data centers

Our article in Science on carbon intensity of oil production, out today!

Awards, Awards, Awards!

Turning Numbers into Knowledge:  Mastering the Art of Problem Solving is a Double Award Winner in the 2018 Global eBook awards!

A chronology of climate denial going back decades

Gas lighting, from a century ago

My talk on climate solutions at Foothill College

Turning Numbers into Knowledge:  Mastering the Art of Problem Solving is a Silver Medal Winner in the 2018 eLit eBook awards!

Turning Numbers into Knowledge is a double winner in the Next Generation Indie Book Awards, with double honorable mentions in the Hoffer Book Awards!

Updated list of articles on Bitcoin electricity use and related topics

A partial list of articles on Bitcoin electricity use

A quote about climate change that says it all

Right-Sizing Data Center Capital for Cloud Migration

Turning Numbers into Knowledge, now out in its 3rd Edition!

My interview on Chris Nelder’s Energy Transition show

Our analysis of the electricity intensity of networks was published last month (Aug 2017)

Our newest work on comatose/zombie servers, out this week

Is natural gas the main driver of declines in coal generation in the US?

This 1991 Shell documentary on climate still holds up well

In Memoriam:  Arthur H. Rosenfeld, Eminent physicist, inspirational researcher, energy efficiency maven

New study from LBNL on NREL analyzing costs and benefits of renewable portfolio standards

Our new report for the Risky Business project, “From Risk to Return”, out today!

Our latest on energy efficiency of computing over time, now out in Electronic Design

My review of Mann and Toles, The Madhouse Effect: How Climate Change Denial is Threatening our Planet, Destroying our Politics, and Driving Us Crazy

Our new Oil Climate Index 2.0 is live!

My online class, Modernizing Enterprise Data Centers for Fun and Profit, starts again next Monday (September 26th)

New online class:  Data center essentials for executives–a beginner’s guide

Why “deep dive” journalism is in rapid decline

Facts and Fiction in Energy Transitions – podcast posted today!

2015 State of the Climate:  Hot, Hot, Hot!

Surprise!: US data center electricity use has been growing slowly for years

Is stabilizing the climate impossible?

My webinar for DOE + EPA today: Why we can’t accurately forecast the future

A very old phone, at the Point Sur lighthouse in California. Photo taken in late March 2016. We've come a long way!

My article in DCD Focus:  Modernizing enterprise data centers for fun and profit

Our journal article critiquing a recent Energy Policy article on nuclear costs has just been released online

Upcoming class: Modernizing enterprise data centers for fun and profit

More excuses from the Breakthrough Institute on data quality

VLab at SRI is having an interesting panel discussion on Smart Buildings and Data-Driven Office Space on February 16, 2016

The three pillars of modern data center operations

Upcoming class: Modernizing enterprise data centers for fun and profit

A Brief Review Of “Dire Predictions”, 2nd Edition, By Mann And Kump

A reply to key comments on our rebound article and blog post

Everyone makes mistakes on the rebound

Our article on electricity demand and GDP is now out in the Electricity Journal, and is free to download until Jan 3, 2016!

Prepare for new Scope 2 emissions reporting requirements with this upcoming free webinar

Calling clean energy innovators (especially rock star women entrepreneurs): Cyclotron Road cohort applications are now open

A highly political example of lying with charts

Upcoming class: Modernizing enterprise data centers for fun and profit

Attack of the zombie servers!

My article in DCD Focus this month:  Modernizing enterprise data centers for fun and profit

Upcoming class: Modernizing enterprise data centers for fun and profit

My colleagues and I just did an “Ask Me Anything” on Reddit, focusing on our Oil Climate Index

A useful infographic for our Oil Climate Index

Our latest research on comatose servers

Carnegie’s Oil-Climate Index web tool is now live

The feasibility of meeting the 2 C warming limit

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Koomey researches, writes, and lectures about climate solutions, critical thinking skills, and the environmental effects of information technology.

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Partial Client List

  • AMD
  • Dupont
  • eBay
  • Global Business Network
  • Hewlett Packard
  • IBM
  • Intel
  • Microsoft
  • Procter & Gamble
  • Rocky Mountain Institute
  • Samsung
  • Sony
  • Sun Microsystems
  • The Uptime Institute
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