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Hannah Daly

@hannahdaly.ie
17K followers 1.9K following 1.5K posts

Professor in Sustainable Energy, UCC 🇮🇪 I write a monthly column for the Irish Times: www.irishtimes.com/tags/hannah-daly Born 351ppm, daughters born 408 & 410, now >420ppm 🚨 ‼️ Former @IEA and @UCL

PostsRepliesMedia
Hannah Daly @hannahdaly.ie · 29/09/2026
Genuinely great to see solar, heat pump and retrofit grants targeting vulnerable homes. It's also good to see the boiler scrappage scheme come immediately rather than in January. I'm sure a lot of people retrofitting right now, and the companies, are relieved they will qualify.
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Jennie C Stephens @jenniecstephens.bsky.social · 28/09/2026
Our new article on his decades of corporate capture made US universities vulnerable to current attacks.
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Glen Peters @glenpeters.bsky.social · 25/09/2026
"Current [El Nino] forecasts suggest that the 2026 event could push global mean surface temperatures in 2027 to almost 1.8°C above pre-industrial levels" 😱 Good rundown of El Nino impacts via @zekehausfather.com www.nature.com/articles/d41...
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Adrian Hiel @adrianhiel.bsky.social · 24/09/2026
As someone who spent 14,400 euro on a heat pump earlier this year with no grants I look at those 14,500 euro in grants with a lot of envy. I just hope the installation market doesn't stall now for 4 months as people wait for them to become available.
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Hannah Daly @hannahdaly.ie · 24/09/2026
Minister Darragh O'Brien has announced a €2000 oil boiler scrappage scheme for older boilers, on top of grants up to €12,500 for heat pumps. I spoke on Morning Ireland about the latest incentive to get Irish homes off heating oil. www.rte.ie/radio/radio1...
rte.ie
Govt to propose boiler scrappage scheme
Kieran McCarthy, Director of KMC Homes in Cork, and Hannah Daly, Professor of Sustainable Energy at University College Cork, discuss the decision by Energy minister Darragh O'Brien to bring a boiler s...
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Hannah Daly @hannahdaly.ie · 18/09/2026
While all attention is on AI and its impact on our brains, energy grids and economy, and whether it will literally kill all of us, is any leader taking climate change seriously any more? AMOC collapse would be *absolutely devastating* and is only one of profound impacts climate change brings.
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Hannah Daly @hannahdaly.ie · 17/09/2026
I wrote an essay, cautioning university students on the use of GenAI for coursework. I hope it's of use. zenodo.org/records/2281...
zenodo.org
The dangers of using AI for coursework: A warning to university students
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Nicolas Hénin @nicolashenin.net · 17/09/2026
Nice campaign by the Norwegian Consumer Council about the declining lifespan of products. Enjoy!
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Hannah Daly @hannahdaly.ie · 03/09/2026
I wonder if the kind of large-scale grassroots pushback against data centres, the kind that has been tipping election results, will emerge in Ireland?
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Katharine Hayhoe @katharinehayhoe.com · 26/08/2026
Glaciers in the Himalayas are rapidly retreating under climate change, leading to widespread formation and expansion of glacial lakes and increasing the risk of glacial lake outburst floods. To date, more than 388 GLOF events have been documented in the region 😰 Source ⬇️
nature.com
Glacial lakes and GLOFs in a warming Himalaya-Karakoram region: current understanding, challenges, and the way forward - npj Natural Hazards
npj Natural Hazards - Glacial lakes and GLOFs in a warming Himalaya-Karakoram region: current understanding, challenges, and the way forward
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Hannah Daly @hannahdaly.ie · 27/08/2026
I'm just going to rob this €100 out of your wallet. Why are you complaining - it's only 0.1% of your annual income?
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Róisín Moriarty @roisinmoriarty.com · 18/08/2026
This was such a great paper to work on, with a great team, so I was delighted when we got the news yesterday that is has been selected as standout open access Irish research paper for 2025 @ioppublishing.bsky.social As @colmduff.bsky.social makes clear in his article below, methane is methane.
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Patrick Bresnihan @pbresnihan.bsky.social · 11/08/2026
In the name of competitiveness and defence, the EU is going backwards on climate action. €800 billion has been committed to prepare for war by 2030, far outstripping anything that is being invested in climate resilience and a green transition. This is madness. www.irishtimes.com/opinion/2026...
irishtimes.com
Opinion: Europe needs to start treating the climate emergency as a threat to our national security
Idea that climate action is about individual responsibility is as ridiculous as suggesting everyone can equip themselves to fight in war
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Patrick Bresnihan @pbresnihan.bsky.social · 06/08/2026
The Government commissioned a €100k report by KMPG not to inform policy but to 'provide the evidence base that supports the position that we should continue to further develop our data centre landscape post 2030.' That is reckless and negligent. www.thejournal.ie/data-centre-...
thejournal.ie
Concerns over supporting data centres ahead of transport or housing scrubbed from government report
Several aspects which questioned continued investment in the sector were later cut from the final version released to the public.
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Hannah Daly @hannahdaly.ie · 06/08/2026
Hugely excited to welcome our first students to the new BSc Sustainability this September. In my column today, I set out my case for this new kind of interdisciplinary degree. www.irishtimes.com/environment/...
irishtimes.com
The climate crisis needs conductors, not just virtuosos
The answers to big global challenges can’t be found within single disciplines
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Hannah Daly @hannahdaly.ie · 07/07/2026
The CSO has released data on metered electricity consumption for 2025. The extraordinary headline figures: - Electricity consumption from data centres grew by nearly 10% last year, and now accounts for 23% of Ireland's electricity demand.
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Hannah Daly @hannahdaly.ie · 24/06/2026
I've been at the International Energy Workshop in Cape Town this week. I'm avoiding the brutal European heat, but the concept of climate overshoot is top of my mind. I gave a keynote talk on how energy systems modelling can evolve to support countries in returning from overshoot.
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Hannah Daly @hannahdaly.ie · 18/06/2026
🎓 Fully funded PhD scholarship! 🎓 Research the impact of AI-driven data centre expansion on the energy transition with me. The project will be co-supervised by one of the world's top experts in AI, Prof. Barry O'Sullivan, from UCC's School of Computer Science.
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For Tech’s Sake @fortechssakepod.bsky.social · 15/06/2026
Have you listened to our episode with @hannahdaly.ie? pod.fo/e/42e262 Hannah is Professor of Sustainable Energy at @ucc.ie and you can find more of her work at HannahDaly.ie.
pod.fo
For Tech’s Sake: Are data centres a drain? (with Prof Hannah Daly)
In this episode, Elaine is joined by energy researcher Prof Hannah Daly to discuss the energy strain data centres represent for Ireland, the greenwashing that enables their proliferation in the fac...
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Hannah Daly @hannahdaly.ie · 11/06/2026
Reflections on the Joint Committee on AI and my new working paper that shows how data centres could consume 55% of Ireland's electricity by 2040 and cause gas demand to rise. hannahdaly.ie/2026-06-11-J...
hannahdaly.ie
Reflections from the Joint Committee on Artificial Intelligence
The energy cost of data centres in Ireland
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Ketan Joshi @ketanjoshi.co · 11/06/2026
A brand new piece for Crikey: digging into what happens now for Australia's data centre debate Anthropic, planning 20GW, would have to build 1.7x the amount of all renewable energy ever built in Australia to date, to meet the 100% mandate. www.crikey.com.au/2026/06/10/m...
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Eoin Daly @eoinmauricedaly.bsky.social · 10/06/2026
Deputy Malcolm Byrne is that sort of person who will say ‘oh you oppose data centre expansion but you have an IPHONE???’ and thinks it’s clever cc @hannahdaly.ie
Oireachtas committee hearing on data centres yesterday
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Ketan Joshi @ketanjoshi.co · 09/06/2026
Worth reading @hannahdaly.ie's full research here - it contains some really stunning numbers. The most important point is the 80% renewable mandate delayed by six years: meaning six years of massive gas use and emissions, breaching carbon budgets and spiking bills zenodo.org/records/2058...
zenodo.org
Data centre expansion in Ireland: the conflict between grid connection policy and national energy and climate targets
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Hannah Daly @hannahdaly.ie · 09/06/2026
Today, I'll brief the Joint Committee on Artificial Intelligence on a new working paper which quantifies the potential energy and emissions from data centres into the future under the new Large Energy User Connection Policy, should 5.8 GW of new capacity (estimated through a market survey) emerge.
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Hannah Daly @hannahdaly.ie · 08/06/2026
It is really heartening to see this kind of integrity. Carbon accounting should absolutely be not agreed by private, industry-led groups.
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Danny Cullenward @ghgpolicy.org · 08/06/2026
I have resigned from the Greenhouse Gas Protocol's Independent Standards Board. The Protocol is openly violating its own rules and has effectively delegated forest carbon accounting standards to a secret, industry-led working group. ghgpolicy.org/s/2026-06-08...
Text too long; see machine-readable PDF at this link: 

https://ghgpolicy.org/s/2026-06-08-Cullenward-resignation.pdfText too long; see machine-readable PDF at this link: 

https://ghgpolicy.org/s/2026-06-08-Cullenward-resignation.pdfText too long; see machine-readable PDF at this link: 

https://ghgpolicy.org/s/2026-06-08-Cullenward-resignation.pdf
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Hannah Daly @hannahdaly.ie · 04/06/2026
New column: Now is the ideal time to make fossil fuel phase-out the organising principle of Ireland's energy and economic strategy. My piece in today's @irishtimes.com: www.irishtimes.com/environment/...
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Philip Boucher-Hayes @philipb-h.bsky.social · 02/06/2026
TLDR: A country in Ireland’s geographical position needs to invest heavily in oceanic research to prepare for whatever is coming. This move by the USA is tearing out the smoke alarm so you can sleep through the fire. Listen: 👉 www.rte.ie/radio/radio1...
rte.ie
Ep 27 - AMOC
The evidence for and against the Atlantic's overturning current reaching a tipping point this century.
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Róisín Moriarty @roisinmoriarty.com · 26/05/2026
We have a couple of summer student vacancies at the moment If you are interested in historical GHG emissions and temperature impacts... ...check out our vacancies page www.ucc.ie/en/epmg/abou... SEFS Summer Student Job Specification
ucc.ie
About | University College Cork
Learn about the Energy Policy and Modelling Group and our research at University College Cork
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Hannah Daly @hannahdaly.ie · 25/05/2026
This article is apparently serious when it celebrates a possible collapse in AMOC because it could mean less rain in Ireland. I read it twice to try to find the punchline; it’s not there. www.irishtimes.com/culture/2026...
irishtimes.com
Could Ireland end up with the climate of Newfoundland or Malmo?
In a Word ... Climate
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Roderic O’Gorman TD @rodericogorman.bsky.social · 21/05/2026
No shame. No accountability. Irish civilians detained after being seized in international waters are now being used as political props by Israel’s far-right Government. What we’re witnessing is performative cruelty - propaganda in advance of potential elections in Israel.
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Flavio Lehner @climateflavors.bsky.social · 21/05/2026
If you're a reviewer or an editor for a scientific journal, I urge you to not hop on the "RCP8.5 is dead" train. There are now editors that reject RCP8.5 but are ok with 1pctCO2. 🤯 Both are what-if scenarios, useful to science. Don't let politics influence what we can research and publish! 1/3
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Joe DeCarolis @jfdecarolis.bsky.social · 21/05/2026
🔌💡 New paper alert: Surging data center and cryptocurrency demand could spike regional electricity costs up to 57% and push U.S. power sector CO₂ emissions up 28% by 2030. iopscience.iop.org/article/10.1... A thread on what we found 🧵👇
iopscience.iop.org
Power system costs and emissions from data center and cryptocurrency mining expansion in the United States
Power system costs and emissions from data center and cryptocurrency mining expansion in the United States, Johnson, Jeremiah X., Wade, Cameron, Blackhurst, Michael, Decarolis, Joseph F, De Queiroz, Anderson R, Posen, I Daniel, Jaramillo, Paulina
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Róisín Moriarty @roisinmoriarty.com · 21/05/2026
This morning Irish climate experts wrote to Minister O'Brien @deptcee.bsky.social to express deep concern that urgent #methane reduction risks being undermined if climate targets are set using a ‘temperature neutrality’ approach. 1/13
irishtimes.com
International scientists plead with Ireland not to adopt controversial greenhouse gas assessment method
Scientists raise alarm over proposal to ease Ireland’s climate obligations
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Community Law & Mediation @clmirl.bsky.social · 07/05/2026
www.irishtimes.com/environment/... “It is impossible to avoid the conclusion that the Government is attempting to dismantle the Climate Act...without actually amending it, to facilitate emissions-intensive projects that are likely to contribute substantially to the State’s emissions profile.”
irishtimes.com
Dismantling of climate law will reduce scrutiny of large infrastructure projects
If a State body is seriously proposing to impact on the environment, it should have overriding public interest stitched in from the outset
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Hannah Daly @hannahdaly.ie · 06/05/2026
Contrast the last two energy stories I’ve been asked to comment on in Irish media: 1. A proposal to lift the nuclear energy ban is to be debated in the Dáil 2. 76 fully electric double-decker buses have reportedly been sitting idle in Dublin for up to 2.5 years
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Ken Caldeira @kencaldeira.com · 29/04/2026
This @carbonbrief.org explainer on the Atlantic Meridional Overturning Circulation (AMOC) is very good. Useful for experts and novices alike. Kudos to @ceciliakeating.carbonbrief.org, @tomoprater.carbonbrief.org and @kerryanncleaver.bsky.social. interactive.carbonbrief.org/amoc-explain...
interactive.carbonbrief.org
AMOC: Is global warming tipping key Atlantic ocean currents towards ‘collapse’?
The AMOC is under threat from human-caused climate change, as warming seas, melting ice and increased rainfall upset the temperature and salt balance of the North Atlantic.
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Hannah Daly @hannahdaly.ie · 27/04/2026
Good to hear that the Irish government is looking into additional payments for heat pumps and efficient cars, rather than just addressing the energy crisis with cuts to fossil fuel prices. However, supporting HVO ("renewable diesel") would be a really bad idea. www.rte.ie/news/ireland...
rte.ie
Govt always looking to reduce energy costs, says minister
Minister for Energy and Climate Darragh O'Brien has said the Government is always looking to do more to make homes more energy efficient and to reduce costs for people.
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Hannah Daly @hannahdaly.ie · 27/04/2026
My local biodiversity group is showing Ireland's first screening of "People's Emergency Briefing On Climate and Nature Breakdown". It's in lovely Tracton, between Carrigaline and Kinsale, in Cork.
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Hannah Daly @hannahdaly.ie · 23/04/2026
No subtle climate-delay tactics on display here from Deputy Danny Healy-Rae during Ireland's Earth Day parliamentary debate - just classic, old-school climate denial, "we can't control the weather". www.oireachtas.ie/en/debates/d...
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Matthew Hayek @matthewhayek.bsky.social · 23/04/2026
Meat and dairy producers haven't been serious about climate change. Yet high-profile climate event planners regularly invite them to speak. Chances are extraordinarily high that, while they will posture as responsible, they will exaggerate & lie. www.newscientist.com/article/2523...
newscientist.com
98 per cent of meat and dairy sustainability pledges are greenwashing
The food industry has made big promises to reduce emissions and become more sustainable, but a review concludes that many of the pledges are not backed up by evidence
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Hannah Daly @hannahdaly.ie · 23/04/2026
I spoke with The Guardian about Ireland's fuel blockades and the silver lining of this whole mess for the energy transition.
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timsearchinger.bsky.social @timsearchinger.bsky.social · 20/04/2026
Many govts hope capturing carbon from power plants burning wood will cause "negative emissions." New Nature Sust. paper today finds this likely increases emissions for decades, generates no negative emissions within 150 years, and increase electricity costs ~3.5-fold. www.nature.com/articles/s41...
nature.com
Decades of increased emissions from forest-fuelled BECCS - Nature Sustainability
Governments are considering subsidies for bioenergy with carbon capture and storage fuelled by wood from existing forests. However, a transparent model estimates that this will probably increase emiss...
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Colm Duffy @colmduff.bsky.social · 20/04/2026
We published a reply to comment on our recent Temperature Neutrality Paper. The (very) short version: If everyone does it, the very assumptions that underpin it are invalidated. #ClimateChange #ClimateMitigation #Climatepolicy #TemperatureNeutrality www.linkedin.com/posts/colm-d...
linkedin.com
National temperature neutrality, agricultural methane and climate policy: reinforcing inequality in the global food system | Colm Duffy
📣 This morning we have a 🗞️ new paper (reply to comment) out in Environmental Research Letters: It highlights a simple but important problem with “temperature neutrality” (TN) as a national climate t...
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Hannah Daly @hannahdaly.ie · 17/04/2026
Great article on the carbon tax from John.
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Hannah Daly @hannahdaly.ie · 16/04/2026
In today's Irish Times, I unpack the many layers of irony associated with the fuel protests over the past week. The government's €750 million financial package to cut fuel prices adds to the ~€4.8 billion in public finance lost each year to fossil fuel subsidies. www.irishtimes.com/opinion/2026...
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Barry McMullin @autofac.bsky.social · 15/04/2026
Where is the IE €750M "fuel support" package actually going? This is where... [Plenty of blame to go around - but put it on the *right* bad actors!]
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Cllr Oisín O'Connor @oisinoconnordublin.bsky.social · 13/04/2026
The long-term solution to the fossil fuel crisis is *not* more fossil fuels.
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Colman O'Sullivan @colmanos.bsky.social · 12/04/2026
1/ A leader of the #fuelprotest told me last night he doesn't believe in climate change, said the climate has always changed and it was hotter 5 million years ago than it is now. I asked how long farmers have been around. Millions of years, he said...
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Philip Boucher-Hayes @philipb-h.bsky.social · 11/04/2026
History is repeating itself. A chance in this energy crisis to copy the choices made in 1970s crises by the countries now almost fossil fuel free. Full documentary series free to stream here: youtu.be/F8vI5_gN90g?...
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