Environment Variables

This Week in Green Software, hosts Oli, Adi, and Valeria explore the growing importance of hourly carbon accounting and what it means for building truly sustainable software. They discuss how moving beyond annual averages to real-time energy data can unlock more accurate insights, better decision-making, and smarter workload placement. The conversation highlights the challenges of measurement, the role of tooling and standards, and why aligning software systems with cleaner energy in the moment could be a key step toward reducing digital emissions.Learn more about our people:Aditya Manglik: LinkedIn | GitHub | WebsiteOli Winks: LinkedIn | GitHub | WebsiteValeria Salis: LinkedIn | GitHub | WebsiteFind out more about the GSF:The Green Software Foundation Website Sign up to the Green Software Foundation NewsletterNews:GSF’s Response to GHG Protocol: Advocating for Hourly Carbon Accounting | GSF [03:11]Big Tech Says Generative AI Will Save the Planet. It Doesn’t Offer Much Proof | Wired [19:25]Developer engagement in open-source software’s green transition | NatureDisplay: green; applying the web sustainability guidelines - Hidde de Vries - CSS Day 2025 | YouTubeResources:GHG Protocol [03:27]What Central Park’s Squirrel Census says about conservation tech | Mongabay [30:54]Events:GreenOps PowerBI Dashboard | 7 Apr 6:30pm CEST (Karlsruhe - Hybrid) [44:25]Green IO Singapore Conference | 14-15 Apr (Singapore) [45:24]If you enjoyed this episode then please either:Follow, rate, and review on Apple PodcastsFollow and rate on SpotifyWatch our videos on The Green Software Foundation YouTube Channel!Connect with us on Twitter, Github and LinkedIn! Hosted on Acast. See acast.com/privacy for more information.

TWiGS hosts Tzviya and Kate are joined by Ryan Sholin of Electricity Maps to discuss how global events impact electricity availability, cost, and carbon intensity. They highlight that improving efficiency and better utilizing existing power grids could reduce the need for new energy infrastructure. The conversation connects energy awareness with software design decisions, emphasizing that developers and organizations can play a role in sustainability by aligning workloads with cleaner energy and understanding the broader energy context behind digital systems.Learn more about our people:Tzviya Siegman: LinkedIn | WebsiteRyan Sholin: LinkedIn | GitHub | WebsiteKate Goldenring: LinkedIn | GitHub | WebsiteFind out more about the GSF:The Green Software Foundation Website Sign up to the Green Software Foundation NewsletterNews:Exclusive: Google, Tesla, others tackle energy affordability | Axios [02:10]Virginia to utilities: Do more with the existing power grid | CanaryMedia [03:38] There's another energy market that may get hit harder than oil by Strait of Hormuz closure [10:08]PUE Ranking - Paweł Czyżak on LinkedIn [14:44]Markdown, llms.txt and AI crawlers | Dries Buytaert [25:44]Datacentre developers face calls to disclose effect on UK’s net emissions | The Guardian [39:14]Events:LUT x Sustinaires | 25 Mar 7:15 AM CET (Remote) [41:29] UX Jumpstart | 26 Mar 2:00 PM CET (Virtual) [41:46] Are you speaking about Green Software? | GSF [41:59] Resources:Marc Brooker's Blog [06:32]Environment Variables Ep 133: TWiGS: Who Pays for AI’s Energy Footprint? [07:09]US data centre efficiency ranked by PUE - Rod McLaren: Words that work TPU vs GPU: Which Is Better for AI Infrastructure in 2025? [19:57]TPUs improved carbon-efficiency of AI workloads by 3x | Google Cloud Blog  Software Carbon Intensity for Artificial Intelligence [21:51]Hugging Face AI Energy Score Project [22:43]Google & Bing Warn: Markdown Files Can Increase Crawl Load and Cause SEO Issues [27:35]Introducing Markdown for Agents [28:57]agent-md | GitHub w3c-cg / ai-content-disclosure | GitHub [30:02]AI Preferences Measuring for Reporting vs Measuring for Action | GSF CarbonDB [34:22]If you enjoyed this episode then please either:Follow, rate, and review on Apple PodcastsFollow and rate on SpotifyWatch our videos on The Green Software Foundation YouTube Channel!Connect with us on Twitter, Github and LinkedIn! Hosted on Acast. See acast.com/privacy for more information.

Oliver Winks, co-founder of Root & Branch who helps firms measure and cut digital impact, and Aditya Manglik, an AI-hardware engineer focused on energy-efficient computing. They explore shift-left sustainability in software development. They discuss measuring impact early, developer tooling like power profiling, incentives and regulation, and practical constraints to drive efficient design.

Host Kate Goldenring is joined by Chris Adams and Tzviya Siegman for a news round-up on sustainable software. They dig into EnergyNet and the idea of routing electricity more like the internet, unpack the latest AI energy and greenwashing debates, and look at policy and research angles — from proactive water planning for data centers to a cap-and-trade style proposal for AI efficiency.Learn more about our people:Chris Adams: LinkedIn | GitHub | WebsiteKate Goldenring: LinkedIn | WebsiteTzviya Siegman: LinkedIn | WebsiteFind out more about the GSF:The Green Software Foundation Website Sign up to the Green Software Foundation NewsletterNews:EnergyNet Task Force [03:50]EnergyNet on GitHub [03:50]EnergyNet expands to 280 apartments in Lund (Warp News) [03:50]Is this EnergyNet thing legit? (Chris Adams) [03:50]Sam Altman / OpenAI energy use and data centers (The Guardian) [12:20]Big Tech says generative AI will save the planet - proof is thin (WIRED) [01:10]Big tech greenwashing report (Ketan Joshi) [13:20]Different kinds of AI in the climate context (Chris Adams) [15:00]AI's Never Just One Thing: Different FLOPS for Different Folks (Hugging Face) [18:20]Great Lakes region unprepared for increasing water use demands(Alliance for the Great Lakes) [30:10]AI Cap-and-Trade: Efficiency Incentives for Accessibility and Sustainability [36:20]If you enjoyed this episode then please either:Follow, rate, and review on Apple PodcastsFollow and rate on SpotifyWatch our videos on The Green Software Foundation YouTube Channel!Connect with us on Twitter, Github and LinkedIn! Hosted on Acast. See acast.com/privacy for more information.

New co-hosts introduce backgrounds in green software and sustainability. The conversation tackles AI's growing energy and water demands and how to make those impacts tangible. They debate location trade-offs for data centers and the complexity and inefficiencies of Kubernetes. The group also explores enabled emissions, ethical concerns around public AI releases, and the need for transparency and disclosure.

This Week in Green Software, Chris Adams is joined by new co-hosts Kate Goldenring and Tzviya Siegman to explore the latest stories on their radars. They unpack Microsoft’s community-first AI infrastructure pledge, the rise of gas-powered data centers, and the hidden embodied emissions behind AI models and storage hardware. The conversation also dives into the energy cost of AI prompts, new research measuring real browser energy use, and emerging models like billing AI by the kilowatt-hour. Together, they examine how transparency, standards, and smarter engineering decisions can shape a more sustainable digital future.Learn more about our people:Chris Adams: LinkedIn | GitHub | WebsiteKate Goldenring: LinkedIn | WebsiteTzviya Siegman: LinkedIn | WebsiteFind out more about the GSF:The Green Software Foundation Website Sign up to the Green Software Foundation NewsletterNews:Building Community-First AI Infrastructure - Microsoft [05:00]Microsoft Pledged to Save Water in the A.I. Era - The New York Times [08:29]Building Community-First AI Infrastructure - Microsoft On the Issues Betting big on data centers, U.S. now leads world for new gas power development - Global Energy Monitor [13:56]The Robles v. Domino’s Settlement (And Why It Matters) [21:56]From FLOPs to Footprints: The Resource Cost of Artificial Intelligence [23:53]The Cost of Politeness in AI [29:54]Green Coding Solutions: webNRG Released [36:50]Energy-Aware Hosted Inference | Neuralwatt Portal [42:35]Resources:Environment Variables Ep 62: Greening Serverless w/ Kate Goldenring [11:24]Environment Variables Ep 104: OCP, Wooden Datacentres and Cleaning up Datacentre Diesel w/ Karl Rabe [12:16]GitHub - Green-Software-Foundation/real-time-cloud: Real Time Energy and Carbon Standards for Cloud Providers [14:56]Web Sustainability Guidelines | W3C [20:14]WCAG 2 Overview | Web Accessibility Initiative (WAI) | W3C [21:00] Software Carbon Intensity (SCI) Specification | GSF [23:22]Ecoinvent [27:06]Solar power in Finland - Energy [44:38]On using solar & batteries to provide 90% of the world population with 90% of their electricity demand for below 90 €/MWh | Chris Adams Solar and batteries can power the world How Did This State Become the Data Center Capital of the World?  Subsidizing the Cloud: U.S. State Incentives to Data Centers Scope True - Reality-Based Corporate Carbon Accounting For the Decarbonization webNRG GitHub - webNRG If you enjoyed this episode then please either:Follow, rate, and review on Apple PodcastsFollow and rate on SpotifyWatch our videos on The Green Software Foundation YouTube Channel!Connect with us on Twitter, Github and LinkedIn! Hosted on Acast. See acast.com/privacy for more information.

Joseph Cook, Head of R&D at the Green Software Foundation, helps build the Impact Framework. Florent Morel, former Green IT lead at Amadeus and co-creator of Carmen, now focuses on sustainable engineering. They discuss Carmen’s approach to measuring software carbon at team and component levels. Short, practical measurements, integration with observability and FinOps, and scaling standardized, transparent metrics across organizations.

Anna Forlati, Head of Digital Sustainability and Impact at TeamSystem and former UX designer, shares her move from UX into ESG and sustainability leadership. She talks about B Corp meaning versus regulation. Inclusive design as a sustainability strategy. Practical ideas like sustainable modes, low-bandwidth design and speculative personas. Cultural change, measurable wins and long-term "cathedral thinking" round out the conversation.

In this episode, host Chris Adams is joined by Wilco Burggraaf and Robert Keus of GreenPT to unpack what greener prompting and transparent AI actually look like in practice. They discuss why most AI services hide their environmental impact, how GreenPT exposes real energy and carbon data to users, and why user behavior plays a major role in AI’s footprint. The conversation explores prompt length, session design, model efficiency, and the limits of chat-based AI, making a strong case for transparency, better defaults, and more purposeful use of AI if it’s going to scale responsibly.Learn more about our people:Chris Adams: LinkedIn | GitHub | WebsiteRobert Keus: LinkedIn | WebsiteWilco Burggraaf: LinkedIn | Medium | WebsiteFind out more about the GSF:The Green Software Foundation Website Sign up to the Green Software Foundation NewsletterResources:GreenPT [01:14] Green Software - The Netherlands | Meetup [02:34]Scaleway [22:40]Neuralwatt [29:23]If you enjoyed this episode then please either:Follow, rate, and review on Apple PodcastsFollow and rate on SpotifyWatch our videos on The Green Software Foundation YouTube Channel!Connect with us on Twitter, Github and LinkedIn! Hosted on Acast. See acast.com/privacy for more information.

Chris Adams speaks with Tom Kerkhove of the Microsoft Azure API Management team about how thoughtful API design can reduce energy use and improve system efficiency. They discuss how API gateways, caching, throttling, and observability can cut unnecessary compute and data transfer, while also improving reliability and developer experience. The conversation shows how small architectural decisions at the API layer can have an outsized impact on cost, performance, and sustainability at scale.Learn more about our people:Chris Adams: LinkedIn | GitHub | WebsiteTom Kerkhove: LinkedIn | WebsiteFind out more about the GSF:The Green Software Foundation Website Sign up to the Green Software Foundation NewsletterResources:Solar Protocol [02:33]KEDA [04:37] Azure API Management [10:01]Grid-aware websites - Green Web Foundation [20:37]Electricity Maps [23:25]Real Time Energy and Carbon Standard for Cloud Providers [26:17]Azure API Management | Microsoft Azure Blog [30:01]If you enjoyed this episode then please either:Follow, rate, and review on Apple PodcastsFollow and rate on SpotifyWatch our videos on The Green Software Foundation YouTube Channel!Connect with us on Twitter, Github and LinkedIn! Hosted on Acast. See acast.com/privacy for more information.