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Kornelis Blok

@kornelis.bsky.social

2.9K followers 1.5K following 110 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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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

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Reposted by Kornelis Blok

Scientific American @sciam.bsky.social · 1d

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

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Reposted by Richard S.J. Tol, Kornelis Blok

Reuters @reuters.com · 13d

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

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Reposted by Kornelis Blok

Chris Bataille @chrisbataille.bsky.social · 15d

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.

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Reposted by Kornelis Blok

Glen Peters @glenpeters.bsky.social · 16d

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...

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Kornelis Blok @kornelis.bsky.social · 20d

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

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Kornelis Blok @kornelis.bsky.social · 21d

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

Simon Evans @drsimevans.carbonbrief.org · 21d

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 · 21d

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.

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Reposted by Kornelis Blok

Simon Evans @drsimevans.carbonbrief.org · 21d

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...

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Kornelis Blok @kornelis.bsky.social · 21d

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 · 21d

"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

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Kornelis Blok @kornelis.bsky.social · 22d

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

Lauri Myllyvirta @laurimyllyvirta.bsky.social · 22d

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.

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Reposted by Kornelis Blok

Lauri Myllyvirta @laurimyllyvirta.bsky.social · 22d

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Reposted by Kornelis Blok

Alaina Wood @thegarbagequeen.bsky.social · 22d

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.

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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

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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/...

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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

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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

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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

www.carbonbrief.org

Reposted by Robert Falkner, Nathalie Pettorelli, Kornelis Blok , and 4 more Robert Falkner, Nathalie Pettorelli, Kornelis Blok, Brett Christophers, Nepal, William F. Lamb, David Leclère

Carbon Brief @carbonbrief.org · May 14

NEW – Analysis: Clean energy just put China’s CO2 emissions into reverse for first time | @laurimyllyvirta.bsky.social

Read here: buff.ly/6eAcjRU

Line chart – China's CO2 emissions are now 1% below their March 2024 peak: China’s emissions from fossil fuels and cement, million tonnes of CO2, rolling 12-month totals. Source: Emissions are estimated from National Bureau of Statistics data on production of different fuels and cement, China Customs data on imports and exports and WIND Information data on changes in inventories, applying emissions factors from China’s latest national greenhouse gas emissions inventory and annual emissions factors per tonne of cement production until 2024. Sector breakdown of coal consumption is estimated using coal consumption data from WIND Information and electricity data from the National Energy Administration.

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Kornelis Blok @kornelis.bsky.social · Apr 19

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

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Kornelis Blok @kornelis.bsky.social · Apr 17

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/...

“Homeowners unaware of flood risks”: Why scientists are developing a water label for Dutch homes

From installing special window shutters and flood-protection valves to choosing floors that can take a splash: there are many things homeowners can do to prevent damage when the water comes. But in th...

www.tudelft.nl

Reposted by Kornelis Blok

Glen Peters @glenpeters.bsky.social · Apr 16

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/

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Kornelis Blok @kornelis.bsky.social · Apr 15

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

Harvard’s Decision to Resist Trump Is ‘of Momentous Significance’ (Gift Article)

But a fight with the nation’s oldest, richest and most elite university is a battle that President Trump and his powerful aide, Stephen Miller, want to have.

www.nytimes.com

Kornelis Blok @kornelis.bsky.social · Mar 25

Nice graphs! What is the source?

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Kornelis Blok @kornelis.bsky.social · Mar 10

Martien, gaat het hier om de toename van elektrisch koken (sinds wanneer?) of om het totaal?

Reposted by Kornelis Blok

Jesse D. Jenkins @jessedjenkins.com · Mar 6

“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
🔌💡

NEW REPORT: Clean Energy Dominates in 2024 | ACP

• 93% of new energy capacity that came online last year was solar, wind, and storage • 49 GW of clean energy installed in 2024 • Clean energy in the […]

cleanpower.org

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Reposted by Kornelis Blok

Eliot Higgins @eliothiggins.bsky.social · Feb 28

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.

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Bluesky Wins @blueskywins.bsky.social · Feb 27

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

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Reposted by Kornelis Blok

Christian Breyer @christianonre.bsky.social · Feb 26

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

TU Delft research suggests back contact tech may push crystalline silicon PV over 28% threshold

Researchers in the Netherlands have investigated how carrier-selective contacts may help achieve stronger performance in back-contact (BC) crystalline silicon solar cells and have predicted efficienci...

www.pv-magazine.com

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