Can universities lead on clean technologies?🌱⚡Join the next webinar in EUA’s ‘Spotlight on Sustainability’ series. 📅 09 Dec 2025 | 10.30 CET 🔗 Registrations will remain open until the webinar starts at https://bit.ly/3XcQ6hp 🗣️ Carlos Härtel, Stella Tsani, @kornelis.bsky.social

NEW: I wrote about British churches installing heat pumps, in some cases in 1,000-year-old buildings! Decarbonisation may not be easy, but many view it as an act of faith. This is a special feature to mark The Reengineer’s first anniversary! Spread the word! 🥳 www.thereengineer.pro/p/let-there-...

Een gem. huishouden betaalt nu €1000/jr meer voor energie dan 5 jaar geleden; en nog in veelvoud indirect via inflatie. #grafiekvandedag De stijging (+ inflatie) wordt mogelijk flink groter; ook voor 'gas-loos'. Zie mijn (gratis) column vandaag op Energiepodium. www.energiepodium.nl/artikel/onze...

Very nice visualisation 👇 The fact the 75% can be electrified, doesn't mean that 75% of final energy use will be electricity. Electrification leads to a reduction of final energy use, typically by a factor 2,5 - 4. The share of electricity will then probably end up around 50%.

Science-Based Targets initiative has published a 2nd consultation draft of the new Corporate Net-Zero Standard. This is a core document in the family of standards. Any comments welcome! sciencebasedtargets.org/consultation...

Lots of anti-net zero noise, but a major new report from SBTI shows the number of companies with net zero targets has surged and those with goals in place are reporting multiple financial, operational, and reputational benefits. www.businessgreen.com/news/4521250...

"Keeping global temperature rise below 2 degree ˚C is surely feasible". Interview related to the next IPCC report (in Dutch). www.change.inc/klimaatveran...

A famous graphic, now updated, compares locomotion in the animal kingdom

Indonesia starts construction of 92 megawatt floating solar plant reut.rs/4pXLGbI

I'd wager anyone in that room is more qualified to be Secretary of Defence, and better understands the threat multiplier implications of climate change. Security think tanks have been thinking about it since the 1970s, & the Pentagon formally since the 1990s.

Some of the most interesting trends in electric car sales are in developing countries, here Indonesia. When price parity is reached & energy security is a concern, EVs will take off in the developing world. Check some charts here (mainly developed countries) robbieandrew.github.io/carsales/

Balanced perspective on solar geo-engineering: by @hausfath.bsky.social, www.nytimes.com/2025/09/21/o...

Xi Jinping announced China's new climate targets personally, a positive gesture, but the targets brought little clarity on China’s future emission pathway. Targeting a 7-10% emission reduction by 2035 from an undefined "peak level" undersells China's current clean energy boom.

Important message from Xi 👇 Hopefully they "will do - a lot - better".

The basic dilemma for China's leaders is: you have to cut either the clean energy industry or the coal industry down to size; both can't continue to grow like they have. These targets just show they still haven't made up their minds, balking at the economic fallout from either.

Natural gas imported from the US to the Netherlands causes 40% higher greenhouse gas emissions than the gas we used to extract from the Groningen field. Contribution to the "Climate Helpdesk" (in Dutch): www.klimaathelpdesk.org/answers/wat-...

"The world isn't slowing down on climate". I think EU Commissioner Hoekstra is right and that is good news. The bad news is that we are not accelerating. www.nytimes.com/2025/09/24/c...

I keep telling y’all that your voice and wallet are more powerful than you think, so maybe we should stop listening to the doomers and accelerationists who think things are hopeless — because things are only hopeless if we all give up.

👇 Thread on "the most significant climate announcement of the year"

Podcast on Feasibility of 100% Renewable Energy Systems youtu.be/GXadcmYfWGY for this paper from 2018 doi.org/10.1016/j.rs... @lut.fi @nworbmot.bsky.social @kornelis.bsky.social @brianvad.bsky.social

The 1.5˚C target remains a critical objective - even if we are on the way to exceed it. Important paper by Rogelj and Rajamani: www.science.org/doi/10.1126/...

Great thread on yesterdays ruling on climate by the International Court of Justice:

De kans op daadwerkelijke conversie van Powerpoints naar operationele waterstoffabrieken groeit. En dat werd tijd, dus dat is mooi. www.wattisduurzaam.nl/49462/energi...

Very good overview of the role of aerosols in (masking) global warming: www.carbonbrief.org/explainer-ho...

NEW from me: China's CO2 emissions fell ~1.6% in the first quarter and have now been flat or down for more than a year. This is the first time on record that emissions are falling due to clean energy growth, not slow power demand.

So far, 2025 is a very warm year, despite the dissipation of El Nino. Data for March: berkeleyearth.org/march-2025-t...

Just your regular reminder of where global CO2 emissions are tracking compared to scenarios that keep warming to below 1.5C in 2100, with "no or low overshoot" (maximum temperature around 1.6C). journals.sagepub.com/doi/full/10.... C1/

How vulnerable are you to flooding and what can you do about it? Scientists develop "water label" for Dutch homes: www.tudelft.nl/en/2025/tbm/...

Harvard’s Decision to Resist Trump Is ‘of Momentous Significance’ (gift article) www.nytimes.com/2025/04/14/u...

“It took more than 20 years for the U.S. to install the first 100 GW of clean power, five years to install the next 100 GW, and three years to install the most recent 100 GW" cleanpower.org/news/market-... #Upshift 🔌💡

Polish Prime Minister Donald Tusk responds, something we hopefully see a lot more of that from other European leaders. It's never been clearer than in this moment that Trump is Putin's ally, not Europe's.

Already posted Kees before, but it's one account I've grown to like - needs a much bigger following here. Truly one of the best accounts on #EnergySky @sustainable2050.bsky.social

TU Delft research suggests back contact tech may push crystalline silicon PV over 28% threshold www.pv-magazine.com/2025/02/24/t...

‼️The US-based @ipcc.bsky.social technical support unit (TSU) for Working Group 3 Co-Chairs has been terminated, and the US won’t be attending next week’s IPCC meeting where the AR7 chapter outlines will be approved. More by @afreedma.bsky.social here:

Evaluation of our series of online courses "Designing a Climate-Neutral World": learners are very positive (scale from 0 tot 10) 👇

Some truly excellent talks on energy transition, critical raw materials, climate change & water resources - and a much needed positive message on #CO2 emissions from @kornelis.bsky.social at the half-Lustrum event that our #geoscience & #mining student association at TU Delft hosted today.

the way to shield households from volatile gas prices is to shift to renewables & heat pumps

EU greenhouse gas emissions fell by 0.6% in Q3 2024 📉, while the economy grew 1.3% 📈 ✅ 16 EU countries cut emissions - Austria 🇦🇹 (-7.8%) led the way! ✅ Biggest sectoral reductions: Electricity & gas (-6.7%) A cleaner, stronger economy is possible! 🌍 🔽 europa.eu/!RwW8QF

If Christ would walk in today ... Strong message!

You know what? Let's not fill our European gas storages, now our LNG supplier the US has elected someone who would love to imitate Putin by using his country's leverage as a supplier in times of scarcity. Makes life a little cheaper now, and we'll see what happens next winter.

The UK has set out an ambitious national climate plan for 2035. Will any countries follow?

Go! go! go!

Is 2 °C dead? In my opinion, it's too early to say, given all the uncertainties. Read the excellent Guardian article here, including links to underlying material 👇

1/ Green energy for mobile machines in the future? Yes! Find out more in our new research publication doi.org/10.1002/aesr.... Joint research of @VTTFinland @UniLUT #TampereUNI. Green electricity, hydrogen, and e-fuels – globally.

🚫 Despite all the negativity in the media about electric vehicles not selling: ⬆️ ⬆️ ⬆️ 24% more EVs were sold in 2024 than in 2023. Graphic from @nathanielbullard.com

A lot of interesting stuff - this one 👇 struck me most: China moves from very low levels to about 50% sales share of electric vehicles within 5 years (including PHEV). Are they ready for 100% by 2030? Could the rest of the world repeat that?

This 👇

Not a fan of ChatCPT etc for other reasons, but this is a good observation about perspective. (It reminds me of the panic over emissions from computer gaming. Which yes, are high, but staying in and gaming is almost certainly much lower CO2 than driving anywhere...)

"'If there really were an energy emergency, then the right thing to do would be to increase supplies of all forms of energy, & to try to use energy conservation initiatives'... executive orders are aimed at loosening those requirements so appliances would use ⬆️ energy & cars would burn ⬆️ gasoline."

New US administration wages culture war on renewable energy: www.nytimes.com/2025/01/21/c...