Kornelis Blok
@kornelis.bsky.social
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
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
Pinned
Kornelis Blok
@kornelis.bsky.social
· Jan 21
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
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
"Designing a Climate-Neutral World"
The courses just started again and are free of charge!
online-learning.tudelft.nl/programs/cli...
@tudelft.bsky.social
Reposted by Kornelis Blok
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/
*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/
November 25, 2025 at 9:10 PM
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/
*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/
Reposted by Kornelis Blok
I’m really surprised this isn’t bigger news. Just under 10 million people live in Tehran. Where can they go? Where else in Iran will have enough water? This will undoubtedly strain the country’s and the region’s politics, finances and governance capacity.
'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 🇮🇷
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
November 21, 2025 at 8:13 PM
I’m really surprised this isn’t bigger news. Just under 10 million people live in Tehran. Where can they go? Where else in Iran will have enough water? This will undoubtedly strain the country’s and the region’s politics, finances and governance capacity.
Reposted by Kornelis Blok
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
📅 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
November 11, 2025 at 7:19 AM
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
📅 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
Reposted by Kornelis Blok
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-...
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
November 13, 2025 at 12:06 PM
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-...
This is a special feature to mark The Reengineer’s first anniversary! Spread the word! 🥳
www.thereengineer.pro/p/let-there-...
Reposted by Kornelis Blok
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...
De stijging (+ inflatie) wordt mogelijk flink groter; ook voor 'gas-loos'. Zie mijn (gratis) column vandaag op Energiepodium.
www.energiepodium.nl/artikel/onze...
November 11, 2025 at 8:57 AM
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...
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%.
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%.
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
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
November 8, 2025 at 7:49 PM
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%.
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...
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
November 7, 2025 at 10:23 AM
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...
Reposted by Kornelis Blok
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
November 3, 2025 at 12:52 PM
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...
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
October 16, 2025 at 11:20 AM
"Keeping global temperature rise below 2 degree ˚C is surely feasible". Interview related to the next IPCC report (in Dutch).
www.change.inc/klimaatveran...
www.change.inc/klimaatveran...
Reposted by Kornelis Blok
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
October 14, 2025 at 1:52 PM
A famous graphic, now updated, compares locomotion in the animal kingdom
Reposted by Kornelis Blok
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
October 3, 2025 at 3:30 AM
Indonesia starts construction of 92 megawatt floating solar plant reut.rs/4pXLGbI
Reposted by Kornelis Blok
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.
September 30, 2025 at 9:10 PM
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
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/
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/
September 29, 2025 at 9:40 AM
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/
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...
by @hausfath.bsky.social, www.nytimes.com/2025/09/21/o...
Opinion | Turns Out Air Pollution Was Good for Something
www.nytimes.com
September 25, 2025 at 8:12 AM
Balanced perspective on solar geo-engineering:
by @hausfath.bsky.social, www.nytimes.com/2025/09/21/o...
by @hausfath.bsky.social, www.nytimes.com/2025/09/21/o...
Reposted by Kornelis Blok
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.
September 24, 2025 at 8:09 PM
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".
Hopefully they "will do - a lot - better".
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...
docs.google.com/docu...
September 24, 2025 at 9:36 PM
Important message from Xi 👇
Hopefully they "will do - a lot - better".
Hopefully they "will do - a lot - better".
Reposted by Kornelis Blok
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.
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.
September 24, 2025 at 9:31 PM
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-...
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
September 24, 2025 at 12:24 PM
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-...
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 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
September 24, 2025 at 12:23 PM
"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 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...
Reposted by Kornelis Blok
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.
September 23, 2025 at 11:34 AM
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"
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.
September 23, 2025 at 2:14 PM
👇 Thread on "the most significant climate announcement of the year"
Reposted by Kornelis Blok
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
@lut.fi @nworbmot.bsky.social @kornelis.bsky.social @brianvad.bsky.social
Feasibility of 100% Renewable Energy Systems
YouTube video by Christian Breyer
youtu.be
August 27, 2025 at 1:41 PM
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
@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/...
July 30, 2025 at 10:17 AM
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:
🔥 ⚖️ 🌐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
🚨This ruling could signal a new dawn for climate law & accountability
📝 🧵 Live thread below with context, summary & analysis 👇
#ClimateJusticeAO #AOLetsGo
July 24, 2025 at 8:00 AM
Great thread on yesterdays ruling on climate by the International Court of Justice:
Reposted by Kornelis Blok
De kans op daadwerkelijke conversie van Powerpoints naar operationele waterstoffabrieken groeit. En dat werd tijd, dus dat is mooi.
www.wattisduurzaam.nl/49462/energi...
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
July 21, 2025 at 6:24 AM
De kans op daadwerkelijke conversie van Powerpoints naar operationele waterstoffabrieken groeit. En dat werd tijd, dus dat is mooi.
www.wattisduurzaam.nl/49462/energi...
www.wattisduurzaam.nl/49462/energi...