Kornelis Blok

@kornelis.bsky.social

3K followers 1.5K following 120 posts

Speeding up the energy transition
Professor Energy Systems @TU-Delft
Lead author @IPCC @UNEP Gap Report
Chairman Technical Council @SBTi
Scientific Climate Council @NL
Energy coach @Houten
#energysky #climatesky
www.kornelis.blog .. more

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Energy 36%

Engineering 21%

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Kornelis Blok @kornelis.bsky.social · Jan 21

Today, climate action is needed more than ever. Get started by following our series of open online courses:
"Designing a Climate-Neutral World"
The courses just started again and are free of charge!
online-learning.tudelft.nl/programs/cli...
@tudelft.bsky.social

Professional Certificate: Climate-Neutral World: Theory, Applications and Taking Action | TU Delft Online

Mitigating climate change is one of the biggest challenges for the coming decades. In this program you will gain knowledge and basic skills and tools to design a concrete action plan to make an organi...

online-learning.tudelft.nl

Reposted by Kornelis Blok

Glen Peters @glenpeters.bsky.social · 23h

The costs of Direct Air Capture will not fall as much as hoped. "Efforts to reduce carbon emissions should therefore* continue at pace, says the research team."

*Therefore is problematic here, as it implies that if DACCS was cheap less reductions are needed. No, no, no.

ethz.ch/en/news-and-...

1/

Dr. Aaron Thierry @thierryaaron.bsky.social · 5d

'Iran’s capital must be moved because the country “no longer has a choice,” President Masoud Pezeshkian said on Thursday in remarks carried by state media, warning that severe ecological strain has made Tehran impossible to sustain'

#Iran 🇮🇷

Iran president says capital move now a necessity as water crisis deepens

Iran’s capital must be moved because the country “no longer has a choice,” President Masoud Pezeshkian said on Thursday in remarks carried by state media, warning that severe ecological strain has mad...

www.iranintl.com

Reposted by Kornelis Blok

Chris Baraniuk @chrisbaraniuk.com · 13d

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-...

Let there be warmth! The British churches putting their faith in heat pumps

Ancient buildings and old bones aren’t getting in the way of decarbonisation

www.thereengineer.pro

Reposted by Kornelis Blok

Martien Visser @bmvisser.bsky.social · 15d

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...

Reposted by Kornelis Blok

European University Association (EUA) @eua.eu · 15d

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

Promotional image for a webinar titled "Technological innovation – universities' role and dilemmas in sustainability", scheduled for 9 December 2025. The event is part of the EUA webinar series on sustainability. The background shows a blurred image of trees, emphasizing the theme of sustainability.

Kornelis Blok @kornelis.bsky.social · 18d

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%.

Ember @ember-energy.org · 18d

Electrification could now reach 75% of all energy demand, as the road-transport and heating sectors rapidly electrify 🔥🚗

These two sectors account for 50% of global energy use and are now ready to switch from fossil molecules to clean electrons.

https://loom.ly/BwyhReA

Reposted by A. E. Dessler, Kornelis Blok, Juan Cole , and 1 more A. E. Dessler, Kornelis Blok, Juan Cole, Aija Leiponen

Ember @ember-energy.org · 18d

Kornelis Blok @kornelis.bsky.social · 19d

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...

Corporate Net-Zero Standard V2 Second Public Consultation

Explore the second draft of the Corporate Net-Zero Standard V2 with our digital consultation guide.

sciencebasedtargets.org

Kornelis Blok @kornelis.bsky.social · 19d

Mooie analyse, dank!

Reposted by Kornelis Blok

James Murray @james-bg.bsky.social · 23d

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...

SBTi: Number of firms with net zero goals triples in 18 months

Poll of leading corporates finds vast majority are enjoying reputational and financial benefits from having a validated emissions target in place

www.businessgreen.com

Kornelis Blok @kornelis.bsky.social · Oct 16

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

Prof. Blok met honderden wetenschappers begonnen aan nieuw IPCC-klimaatrapport: ‘2 graden opwarming nog steeds haalbaar’ - Change Inc.

Het klimaatdoel van 1,5 graad opwarming gaat de wereld niet meer halen, maar 2 graden is nog steeds mogelijk, betoogt Em. Prof. Dr. Kornelis Blok. De komende drie jaar is hij voor de vierde keer hoofd...

www.change.inc

Reposted by Kornelis Blok

Scientific American @sciam.bsky.social · Oct 14

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

The Most Efficient Traveler Isn’t a Bird or a Fish—It’s You on a Bike

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

www.scientificamerican.com

Reposted by Richard S.J. Tol, Kornelis Blok

Reuters @reuters.com · Oct 3

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

Indonesia starts construction of 92 megawatt floating solar plant

Indonesia's state utility firm Perusahaan Listrik Negara (PLN) has started constructing a 92-megawatt-peak floating solar power plant in the West Java province as part of the country's renewable energy drive, it said on Friday.

reut.rs

Reposted by Kornelis Blok

Chris Bataille @chrisbataille.bsky.social · Sep 30

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.

Reposted by Kornelis Blok

Glen Peters @glenpeters.bsky.social · Sep 29

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/

Indonesia is up to 20% new car sales are EVs, in the space of a few years...

Kornelis Blok @kornelis.bsky.social · Sep 25

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

Opinion | Turns Out Air Pollution Was Good for Something

www.nytimes.com

Kornelis Blok @kornelis.bsky.social · Sep 24

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

Simon Evans @drsimevans.carbonbrief.org · Sep 24

FULL TEXT: Unofficial transcript of remarks delivered by China's president Xi Jinping to the UN climate action summit, including the outlines of China's 2035 climate pledge

docs.google.com/docu...

Reposted by Harro v. Asselt, Kornelis Blok

Lauri Myllyvirta @laurimyllyvirta.bsky.social · Sep 24

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.

Reposted by Kornelis Blok

Simon Evans @drsimevans.carbonbrief.org · Sep 24

FULL TEXT: Unofficial transcript of remarks delivered by China's president Xi Jinping to the UN climate action summit, including the outlines of China's 2035 climate pledge

docs.google.com/docu...

Kornelis Blok @kornelis.bsky.social · Sep 24

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-...

Wat is de extra klimaatimpact als we gas uit de Verenigde Staten gebruiken in plaats van gas uit Groningen?

Als we aardgas uit de Verenigde Staten importeren, wordt de uitstoot van broeikasgassen hoger. Dat heeft twee redenen. Ten eerste komt in de Verenigde Staten bij de winning en het transport van aardga...

www.klimaathelpdesk.org

Kornelis Blok @kornelis.bsky.social · Sep 24

"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...

Despite Trump, the World Isn’t Slowing on Climate, E.U. Official Says

www.nytimes.com

Kornelis Blok @kornelis.bsky.social · Sep 23

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

Lauri Myllyvirta @laurimyllyvirta.bsky.social · Sep 23

As China prepares to publish its emission reduction targets for 2035, likely the most significant climate announcement of the year, here is a chart to compare the target to what needs to happen under different global climate targets.

Reposted by Kornelis Blok

Lauri Myllyvirta @laurimyllyvirta.bsky.social · Sep 23

Reposted by Kornelis Blok

Alaina Wood @thegarbagequeen.bsky.social · Sep 23

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.

Reposted by Kornelis Blok

Christian Breyer @christianonre.bsky.social · Aug 27

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

Feasibility of 100% Renewable Energy Systems

YouTube video by Christian Breyer

youtu.be

Kornelis Blok @kornelis.bsky.social · Jul 30

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/...

Kornelis Blok @kornelis.bsky.social · Jul 24

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

🌍⚖️ Sébastien Duyck @duycks.bsky.social · Jul 23

🔥 ⚖️ 🌐HAPPENING NOW: Historic #ClimateJustice Ruling being delivered by the 🇺🇳 🧑‍⚖️ International Court of Justice.
🚨This ruling could signal a new dawn for climate law & accountability
📝 🧵 Live thread below with context, summary & analysis 👇
#ClimateJusticeAO #AOLetsGo

Reposted by Valerie M. Delmotte, Simon L. Lewis, Peter Thorne , and 3 more Valerie M. Delmotte, Simon L. Lewis, Peter Thorne, Kornelis Blok, Garry Peterson, Elsa Tsioumani

🌍⚖️ Sébastien Duyck @duycks.bsky.social · Jul 23

Reposted by Kornelis Blok

Thijs ten Brinck @wattisduurzaam.bsky.social · Jul 21

De kans op daadwerkelijke conversie van Powerpoints naar operationele waterstoffabrieken groeit. En dat werd tijd, dus dat is mooi.

www.wattisduurzaam.nl/49462/energi...

Serieuze subsidie voor 602 MW aan groene waterstofproductie

De Rijksdienst voor Ondernemend Nederland (RVO) heeft ruim €700 mln subsidie toegekend aan 11 elektrolyseprojecten in Nederland. Als alle intenties tot een investeringsbeslissing komen, levert dat …

www.wattisduurzaam.nl

Kornelis Blok @kornelis.bsky.social · Jun 11

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

Explainer: How human-caused aerosols are ‘masking’ global warming - Carbon Brief

Carbon Brief unpacks the climate effects of aerosols, how their emissions have changed over time and how they could impact the pace of future warming

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