Power and Grid Strategy

• Global data centre power demand will nearly double by 2030, driving a US nuclear power revival ahead of a projected 45 gigawatt shortfall by 2028
• Amazon's GW Ranch gas plant in Texas is projected to emit 33 million tonnes of CO2 a year, nine times Amazon's entire global Scope 2 footprint
• Texas is restricting new renewables while approving data centre loads five times the state's peak demand
• Australia projects data centres could hit 12 percent of national demand by 2040, treating curtailed wind and solar as fuel rather than a reason to slow down
• China's five year energy plan links new compute clusters to high-curtailment renewable regions, mirroring Australia's approach
• Frankfurt's 120-plus data centres already draw 40 percent of the city's electricity, headed toward 10 percent of Germany's total by 2037
• South Africa's 6 gigawatt Eskom surplus is a transmission bottleneck, needing 14,500 kilometres of new high voltage line over the next decade

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Cooling and Water Infrastructure

• AI clusters now exceed 100 kilowatts per rack, past air cooling's 10 to 15 kilowatt ceiling, forcing a shift to liquid cooling
• Immersion cooling captures up to 100 percent of heat and pushes PUE below 1.03, versus 1.2 to 1.7 for air cooled facilities
• NVIDIA's liquid cooled Rubin architecture nearly eliminates on-site water use, saving an estimated 4 million dollars a year per 50 megawatt facility
• Google's 2.7 gigawatt Wyoming campus is designed to take zero municipal water, relying on closed loop cooling and its own wells
• Microsoft's Quincy campus spent 10 years and 31 million dollars building a water reuse system that now saves 138 million gallons of groundwater a year
• Finland now legally requires waste heat reuse above 1 megawatt, with compliance due by December 31, 2027
• Utility planners increasingly cite pipe and pumping capacity, not water supply, as the real growth constraint

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Claims Under Scrutiny

• A twelve-claim compendium argues closed loop systems still trade water for dirty power, and nuclear is too slow and costly to decarbonise supply chains
• The same compendium says community-benefit tax breaks often shift grid costs onto residential ratepayers
• A "zero impact" data centre near Florence still carries 4,000 to 6,000 tonnes of CO2e a year once solar lifecycle emissions count
• A peer reviewed Nature study found AI-driven fossil fuel gains emit 3 to 13 times more carbon than data centres themselves
• The same study says renewables would need 4 to 5 times the productivity gains of fossil fuels just to break even
• Google's average data centre uses about 450,000 gallons of water a day, close to a Palm Springs golf course's 370,000
• US golf courses used 531 billion gallons in 2024, thirty times the direct water use of all US data centres combined

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Community Impact and Policy

• Pennsylvania's governor banned non disclosure agreements on data centre projects to force community transparency
• Scotland now requires ministers be notified of applications over 50 megawatts within seven days, but still has no green data centre definition
• England, by contrast, added data centres to its Nationally Significant Infrastructure Projects regime in January 2026, giving a clearer national route
• A new white paper projects unchanged fatality and suicide rates could cause tens of thousands of worker deaths as US capacity nears 80-plus gigawatts by 2030
• Prineville, Oregon shows the counter case: data centre investment lifted a high-unemployment town into sustained job growth
• One analysis argues US-style moratoriums just relocate impact, positioning Brazil's clean grid as an advantage for hosting AI infrastructure instead

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Circular Economy and Hardware Lifecycle

• A Dell ITAD site handling roughly 3,000 units a week resells 65 percent and recycles the rest across 26 material categories
• Recyclable materials only help where local recycling capacity and market demand actually exist
• IBM's Climate-Controlled Diamondback tape runs at up to 45 degrees Celsius and 90 percent humidity, needing no dedicated tape room
• Modern tape adoption delivers up to 84 percent lower storage cost and 97 percent lower energy use than disk
• A refresh framework warns newer, more efficient accelerators can still be the wrong call if the outgoing fleet is only half-used

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AI and Software Efficiency

• A SAP audit found an ECC on HANA system emitting 14 times more CO2 and costing 7 times more than an equivalent Db2 system, tracing the gap to early architecture choices
• GreenPT now ships API-level output compression cutting tokens up to 70 percent at the same price and CO2 per token
• The underlying Ponytail ruleset also cuts generated code volume by around 54 percent while keeping validation and security intact
• Agentic coding tasks consume roughly 1,000 times more tokens than a standard chat exchange, per Microsoft Research and Stanford
• Anthropic's Economic Index found 97 percent of its API usage now shows automation-dominant agentic behaviour
• Shorter prompts cut AI energy use 10 to 30 percent, and simpler verbs like "summarize" over "analyze" cut a further 30 percent
• The Green Software Foundation's Carbon-Aware SDK lets teams shift workload timing and region by real time carbon intensity

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Thanks to Alyson Freeman, Arwel Owen, Navveen Balani, Simon R., ThankGod Obobo, Alex Orr, Andrew Sjoquist, Durval Jacintho, Joerg Wuttke, Mark Butcher, Matthias Haymoz, Michael Lesniak, Obinna Isiadinso, Petteri Nikki, Rachel Johnson Schiebout, Shaolei Ren, Steve Chavez, Tim Christophersen, Andy Davis, Carlos Sandoval Castro, Kristine Suber, Robert Keus, ADRIAN MUNDAY, Douglas Mouton, Jilali Mouale, Lexi Sydow, Lydia Sewell, Pascal Joly and Patrick Galey, and everyone else who contributed insights to this edition.

Find the full list of contributors and voices on LinkedIn: https://www.linkedin.com/pulse/best-linkedin-cw-32-33-green-ict-sustainable-ai-thomas-allgeyer-qwdhe/?trackingId=8EAJFdTL3A3BEN%2Bh%2B9U6wA%3D%3D