Søren Have
@sorenhave.dk
Mobility and Infrastructure Lead at green think tank CONCITO.
Living in Frederiksberg, Denmark.
M.Sc. & PhD (math).
Follow me if you are into climate action, transport/mobility and related areas. Here I write mostly in English, but occasionally in Danish.
Living in Frederiksberg, Denmark.
M.Sc. & PhD (math).
Follow me if you are into climate action, transport/mobility and related areas. Here I write mostly in English, but occasionally in Danish.
Reposted by Søren Have
I recently said that no country is asking people to pay for the true cost of driving, including the externalities. Well, it looks like Denmark might be doing that soon. Kudos to them
Exciting road pricing news out of Denmark!
Today a new expert group for designing the future car taxation was announced, with a focus on the externalities from cars.
See the terms of reference below. I will soon follow up with a piece on why I think it actually can lead to GPS-based road pricing.
Today a new expert group for designing the future car taxation was announced, with a focus on the externalities from cars.
See the terms of reference below. I will soon follow up with a piece on why I think it actually can lead to GPS-based road pricing.
December 9, 2025 at 3:07 PM
I recently said that no country is asking people to pay for the true cost of driving, including the externalities. Well, it looks like Denmark might be doing that soon. Kudos to them
Exciting road pricing news out of Denmark!
Today a new expert group for designing the future car taxation was announced, with a focus on the externalities from cars.
See the terms of reference below. I will soon follow up with a piece on why I think it actually can lead to GPS-based road pricing.
Today a new expert group for designing the future car taxation was announced, with a focus on the externalities from cars.
See the terms of reference below. I will soon follow up with a piece on why I think it actually can lead to GPS-based road pricing.
December 9, 2025 at 3:03 PM
Exciting road pricing news out of Denmark!
Today a new expert group for designing the future car taxation was announced, with a focus on the externalities from cars.
See the terms of reference below. I will soon follow up with a piece on why I think it actually can lead to GPS-based road pricing.
Today a new expert group for designing the future car taxation was announced, with a focus on the externalities from cars.
See the terms of reference below. I will soon follow up with a piece on why I think it actually can lead to GPS-based road pricing.
Reposted by Søren Have
NYC’s congestion pricing cleaned the air. This is also what happened when EZ-Pass was put in place in NJ.
Congestion pricing improved air quality in NYC and suburbs | Cornell Chronicle
Cornell researchers tallied the environmental benefits of New York City’s congestion pricing program and found air pollution dropped by 22% in Manhattan, with additional declines across the city’s fiv...
news.cornell.edu
December 9, 2025 at 2:05 AM
NYC’s congestion pricing cleaned the air. This is also what happened when EZ-Pass was put in place in NJ.
Reposted by Søren Have
When cameras are installed, they issue many violations in the first month, followed by a steep decline in the second month. This suggests that the cameras effectively deter speeding by changing underlying driver behavior rather than relying on sustained revenue extraction.
December 8, 2025 at 8:19 PM
When cameras are installed, they issue many violations in the first month, followed by a steep decline in the second month. This suggests that the cameras effectively deter speeding by changing underlying driver behavior rather than relying on sustained revenue extraction.
Reposted by Søren Have
We have no evidence that driverless cars solve either of the biggest problems with cars (besides pollution).
Safety: We have company claims only, and the cars operate in limited areas and scenarios.
Walkability: A car is always the size of a car, driverless cars still rely on car-first planning.
Safety: We have company claims only, and the cars operate in limited areas and scenarios.
Walkability: A car is always the size of a car, driverless cars still rely on car-first planning.
Repeat after me: The bike lane is not a parking / drop-off lane, irrespective of whether the car has a driver or not.
I read this story while preparing a recent talk examining what robotaxis mean for biking.
Really puts the "AVs are bicyclists' best friends" claims in perspective.
www.jalopnik.com/1895643/cycl...
Really puts the "AVs are bicyclists' best friends" claims in perspective.
www.jalopnik.com/1895643/cycl...
December 8, 2025 at 7:39 AM
We have no evidence that driverless cars solve either of the biggest problems with cars (besides pollution).
Safety: We have company claims only, and the cars operate in limited areas and scenarios.
Walkability: A car is always the size of a car, driverless cars still rely on car-first planning.
Safety: We have company claims only, and the cars operate in limited areas and scenarios.
Walkability: A car is always the size of a car, driverless cars still rely on car-first planning.
Reposted by Søren Have
What about not kill people?
Your next car will be able to do almost anything: https://www.khon2.com/automotive/your-next-car-will-be-able-to-do-almost-anything/
December 8, 2025 at 7:01 PM
What about not kill people?
Reposted by Søren Have
🎉 Some important #CrossBorderRail news! 🎉
After thinking about the idea for more than a decade (yeah, this is later than a DB train!) I am finally starting to plan building a railway organisation for lobbying work. We're soft launching the idea today
Details 👇
jonworth.eu/european-rai...
After thinking about the idea for more than a decade (yeah, this is later than a DB train!) I am finally starting to plan building a railway organisation for lobbying work. We're soft launching the idea today
Details 👇
jonworth.eu/european-rai...
European Rail Passengers Union: lobbying for passengers, cross border
It has been something in the back of my mind for more than a decade: how could railway passengers be better represented to campaign for improvements in international rail? Here's a piece I wrote in 20...
jonworth.eu
December 8, 2025 at 7:00 PM
🎉 Some important #CrossBorderRail news! 🎉
After thinking about the idea for more than a decade (yeah, this is later than a DB train!) I am finally starting to plan building a railway organisation for lobbying work. We're soft launching the idea today
Details 👇
jonworth.eu/european-rai...
After thinking about the idea for more than a decade (yeah, this is later than a DB train!) I am finally starting to plan building a railway organisation for lobbying work. We're soft launching the idea today
Details 👇
jonworth.eu/european-rai...
Reposted by Søren Have
"Human-caused warming" gone. Phew! There I was thinking we had a problem.
It appears that the U.S. Environmental Protection Agency (EPA) has, within the past week, scrubbed a large amount of climate change content from its official website, as well as *removed human-caused warming* from the discussion on its "causes of climate change" page.
December 8, 2025 at 6:42 PM
"Human-caused warming" gone. Phew! There I was thinking we had a problem.
Reposted by Søren Have
Former oil and gas workers in Texas are now fighting to make the industry plug old empty wells, which are exhaling methane and vomiting toxic water (from fracking miles away) all over the state.
Eye-opening story by @mollytaft.com
www.motherjones.com/environment/...
Eye-opening story by @mollytaft.com
www.motherjones.com/environment/...
December 8, 2025 at 1:18 PM
Former oil and gas workers in Texas are now fighting to make the industry plug old empty wells, which are exhaling methane and vomiting toxic water (from fracking miles away) all over the state.
Eye-opening story by @mollytaft.com
www.motherjones.com/environment/...
Eye-opening story by @mollytaft.com
www.motherjones.com/environment/...
Reposted by Søren Have
Europe is on a clear path of decarbonisation.
We bring to life the interactive viewers that show the data behind the progress.
The EEA’s Climate & Energy portal gives you insights based on official info from European countries, tracking emissions, energy use & national targets across the continent.
We bring to life the interactive viewers that show the data behind the progress.
The EEA’s Climate & Energy portal gives you insights based on official info from European countries, tracking emissions, energy use & national targets across the continent.
December 8, 2025 at 8:29 AM
Europe is on a clear path of decarbonisation.
We bring to life the interactive viewers that show the data behind the progress.
The EEA’s Climate & Energy portal gives you insights based on official info from European countries, tracking emissions, energy use & national targets across the continent.
We bring to life the interactive viewers that show the data behind the progress.
The EEA’s Climate & Energy portal gives you insights based on official info from European countries, tracking emissions, energy use & national targets across the continent.
Reposted by Søren Have
This thread about the European Commissioners still all posting on X, now all written up as a blog post: euroblog.jonworth.eu/musk-wants-t...
December 8, 2025 at 8:52 AM
This thread about the European Commissioners still all posting on X, now all written up as a blog post: euroblog.jonworth.eu/musk-wants-t...
Reposted by Søren Have
A message much better stated than I could say it, but which I try to give to ECRs I work with. There are seasons in research and sometimes it is harvest time, but sometimes the seeds are just sitting in the ground resting and waiting for Spring. www.joanwestenberg.com/the-harvest-...
The Harvest Will Come
I spent most of my twenties believing that purpose was something you found once and then held onto.
A winning lottery ticket you kept in your wallet forever.
The self-help industry reinforced this: find your passion. Discover your why. Land on the thing that makes you leap out of bed
www.joanwestenberg.com
December 8, 2025 at 6:22 AM
A message much better stated than I could say it, but which I try to give to ECRs I work with. There are seasons in research and sometimes it is harvest time, but sometimes the seeds are just sitting in the ground resting and waiting for Spring. www.joanwestenberg.com/the-harvest-...
Repeat after me: The bike lane is not a parking / drop-off lane, irrespective of whether the car has a driver or not.
I read this story while preparing a recent talk examining what robotaxis mean for biking.
Really puts the "AVs are bicyclists' best friends" claims in perspective.
www.jalopnik.com/1895643/cycl...
Really puts the "AVs are bicyclists' best friends" claims in perspective.
www.jalopnik.com/1895643/cycl...
December 8, 2025 at 6:00 AM
Repeat after me: The bike lane is not a parking / drop-off lane, irrespective of whether the car has a driver or not.
Reposted by Søren Have
After the little Musk-Sikorski spat this, and Musk's statement to abolish the EU (after the Commission fined X), let's ask ourselves simply:
HOW ARE EUROPEAN COMMISSIONERS USING X NOW?
In this 🧵 I'll document it, Commissioner by Commissioner. When did they last post? How often do they post?
HOW ARE EUROPEAN COMMISSIONERS USING X NOW?
In this 🧵 I'll document it, Commissioner by Commissioner. When did they last post? How often do they post?
December 7, 2025 at 8:18 PM
After the little Musk-Sikorski spat this, and Musk's statement to abolish the EU (after the Commission fined X), let's ask ourselves simply:
HOW ARE EUROPEAN COMMISSIONERS USING X NOW?
In this 🧵 I'll document it, Commissioner by Commissioner. When did they last post? How often do they post?
HOW ARE EUROPEAN COMMISSIONERS USING X NOW?
In this 🧵 I'll document it, Commissioner by Commissioner. When did they last post? How often do they post?
Reposted by Søren Have
If European Digital Sovereignty is to mean anything, it ought to mean NOT posting on a platform owned and run by a fascist intent on undermining the EU!
And don't give me the bullshit you have to be there for "balance" or "reach" - the rules are stacked against you from the outset
And don't give me the bullshit you have to be there for "balance" or "reach" - the rules are stacked against you from the outset
December 7, 2025 at 8:18 PM
If European Digital Sovereignty is to mean anything, it ought to mean NOT posting on a platform owned and run by a fascist intent on undermining the EU!
And don't give me the bullshit you have to be there for "balance" or "reach" - the rules are stacked against you from the outset
And don't give me the bullshit you have to be there for "balance" or "reach" - the rules are stacked against you from the outset
Reposted by Søren Have
So what's the outcome?
2️⃣5️⃣ of the 27 Commissioners have posted in the last week
2️⃣4️⃣ of the 27 generally post every week (Albuquerque has never been on X, Ribera is sporadic, McGrath has somehow stopped)
0️⃣ have stopped as a result of what Twitter has become since the Musk takeover
2️⃣5️⃣ of the 27 Commissioners have posted in the last week
2️⃣4️⃣ of the 27 generally post every week (Albuquerque has never been on X, Ribera is sporadic, McGrath has somehow stopped)
0️⃣ have stopped as a result of what Twitter has become since the Musk takeover
December 7, 2025 at 8:18 PM
So what's the outcome?
2️⃣5️⃣ of the 27 Commissioners have posted in the last week
2️⃣4️⃣ of the 27 generally post every week (Albuquerque has never been on X, Ribera is sporadic, McGrath has somehow stopped)
0️⃣ have stopped as a result of what Twitter has become since the Musk takeover
2️⃣5️⃣ of the 27 Commissioners have posted in the last week
2️⃣4️⃣ of the 27 generally post every week (Albuquerque has never been on X, Ribera is sporadic, McGrath has somehow stopped)
0️⃣ have stopped as a result of what Twitter has become since the Musk takeover
Reposted by Søren Have
What happened on energy and climate in China this year?
A summary of the data, mostly drawing on the latest report from Centre for Research on Energy and Clean Air (by @laurimyllyvirta.bsky.social & team).
My latest Substack:
www.sustainabilitybynumbers.com/p/chinese-em...
A summary of the data, mostly drawing on the latest report from Centre for Research on Energy and Clean Air (by @laurimyllyvirta.bsky.social & team).
My latest Substack:
www.sustainabilitybynumbers.com/p/chinese-em...
What happened on energy and climate in China this year?
Emissions flatlined; clean power pushed out coal; and oil for transport falls again.
www.sustainabilitybynumbers.com
December 5, 2025 at 1:52 PM
What happened on energy and climate in China this year?
A summary of the data, mostly drawing on the latest report from Centre for Research on Energy and Clean Air (by @laurimyllyvirta.bsky.social & team).
My latest Substack:
www.sustainabilitybynumbers.com/p/chinese-em...
A summary of the data, mostly drawing on the latest report from Centre for Research on Energy and Clean Air (by @laurimyllyvirta.bsky.social & team).
My latest Substack:
www.sustainabilitybynumbers.com/p/chinese-em...
Reposted by Søren Have
Five years ago, I became an advisor to Alberta's Eavor Technologies, world leader in closed-loop geothermal technology. Last week their flagship project started delivering power to the German grid.
mliebreich.substack.com/p/big-news-c...
mliebreich.substack.com/p/big-news-c...
Big news - closed loop geothermal delivers first power!
Five years ago, I became an advisor to Alberta's Eavor Technologies, world leader in closed-loop geothermal technology. Last week their flagship project started delivering power to the German grid.
mliebreich.substack.com
December 7, 2025 at 3:15 PM
Five years ago, I became an advisor to Alberta's Eavor Technologies, world leader in closed-loop geothermal technology. Last week their flagship project started delivering power to the German grid.
mliebreich.substack.com/p/big-news-c...
mliebreich.substack.com/p/big-news-c...
Reposted by Søren Have
There we go - now we have higher ranking US officials campaigning publicly against the EU, European governments and the rule of law.
Here an example of pretending only diplomatic passport gives her the freedom to criticise an MEP.
Here an example of pretending only diplomatic passport gives her the freedom to criticise an MEP.
December 7, 2025 at 5:31 PM
There we go - now we have higher ranking US officials campaigning publicly against the EU, European governments and the rule of law.
Here an example of pretending only diplomatic passport gives her the freedom to criticise an MEP.
Here an example of pretending only diplomatic passport gives her the freedom to criticise an MEP.
Reposted by Søren Have
There is no "robotaxi race." Pretending otherwise puts people's lives at risk.
December 7, 2025 at 5:34 PM
There is no "robotaxi race." Pretending otherwise puts people's lives at risk.
Reposted by Søren Have
I think this talk of hydrogen pipelines, new or converted, is mad.
And yes, the fact that we have a ubiquitous electricity grids makes things much easier! I mean, growing up in northern Ontario the local restaurant already had a plug for each car parking space 35 years ago!
And yes, the fact that we have a ubiquitous electricity grids makes things much easier! I mean, growing up in northern Ontario the local restaurant already had a plug for each car parking space 35 years ago!
December 7, 2025 at 6:30 PM
I think this talk of hydrogen pipelines, new or converted, is mad.
And yes, the fact that we have a ubiquitous electricity grids makes things much easier! I mean, growing up in northern Ontario the local restaurant already had a plug for each car parking space 35 years ago!
And yes, the fact that we have a ubiquitous electricity grids makes things much easier! I mean, growing up in northern Ontario the local restaurant already had a plug for each car parking space 35 years ago!
Reposted by Søren Have
TIL about a memorial ceremony in Iceland in 2019 to mark the end of a glacier, changing the place name from Okjökull to Ok (jökull = glacier). Uncompromising wording on the bronze plaque:
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
December 7, 2025 at 5:17 PM
TIL about a memorial ceremony in Iceland in 2019 to mark the end of a glacier, changing the place name from Okjökull to Ok (jökull = glacier). Uncompromising wording on the bronze plaque:
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
"This is to acknowledge that we know what is happening and what needs to be done. Only you know if we did it".
Reposted by Søren Have
With the new U.S. national security strategy (“NSC-88”), I think it is high time to ban Twitter in the EU altogether. At the very least, what the ever loving hell are our politicians doing there anymore?
They provide material for a system that will be used to attack us.
They provide material for a system that will be used to attack us.
December 7, 2025 at 11:32 AM
With the new U.S. national security strategy (“NSC-88”), I think it is high time to ban Twitter in the EU altogether. At the very least, what the ever loving hell are our politicians doing there anymore?
They provide material for a system that will be used to attack us.
They provide material for a system that will be used to attack us.
Reposted by Søren Have
Good thread on why trying to control the size of the human population is at best unlikely to have a significant impact this century and at worst a Trojan horse for racism and eugenics.
1. I hate to see good people wasting their time and energy. And there’s perhaps no greater waste of time and energy than seeking to change the trajectory of the human population. It’s not just futile, but also a massive distraction from things we CAN change. This thread seeks to explain why. 🧵1/12
December 7, 2025 at 1:34 PM
Good thread on why trying to control the size of the human population is at best unlikely to have a significant impact this century and at worst a Trojan horse for racism and eugenics.
Reposted by Søren Have
Recent studies in the field I work in suggest it is probably already too late save most of the West Antarctic Ice Sheet, which means we will have to find ways to adapt to committed sea-level rise of more than 3 metres over the next few centuries.
December 7, 2025 at 8:51 AM
Recent studies in the field I work in suggest it is probably already too late save most of the West Antarctic Ice Sheet, which means we will have to find ways to adapt to committed sea-level rise of more than 3 metres over the next few centuries.