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Søren Have

@sorenhave.dk

3.4K followers 480 following 2.2K posts

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.

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Søren Have @sorenhave.dk · Mar 13

‘Breaking up [with transport infrastructure] is hard to do’ 🎶

But at CONCITO we’re trying to show the path, much inspired by the work of in Wales.

Read our recommendations in this new brief. #dktrp #dkgreen #dkpol concito.dk/en/concito-b...

How do we get mobility that creates more value than it destroys?

Mobility is the potential for movement. That the road is clear if I want to drive. That there is a bus or other public transport running on schedule. That there are safe sidewalks and bike lanes.

concito.dk

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Gordon Padelford @gordonofseattle.bsky.social · 16h

Imagine being the Secretary of Transportation for the entire country and cheering ripping up a crosswalk because of your hatred. Sad little man

Will Stancil @whstancil.bsky.social · 18h

Just openly cheering the destruction of any representation of gay people in public space. They think their power is totally unrestricted, and the entire country will support them rolling back society to the 1950s, or maybe the 1850s

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Jaap Burger @jaapburger.eu · 20h

The German charging rollout focus has shifted to DC charging hubs. A welcome addition, but not so much for affordability. Opportunities for (public) smart charging would also help to reduce costs.
(Enforcement of) price transparency is currently being frowned upon by the relevant authority.

Jaap Burger @jaapburger.eu · 20h

For users who do not have this and are dependent on public charging, the TCO in Germany is only favourable in a few cases. Discussed solutions such as strict enforcement of EU rules on price transparency, strengthening competition and (passing on) time-varying grid tariffs could help in this regard.

Number of scenarios in which EVs are cheaper than comparable combustion engine cars:

at home with PV: 53%
at home without PV: 28%
public charging: 9%
public DC fast charging: 5%

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Søren Have @sorenhave.dk · 14h

‘In a last effort flint stone axe producers lobbied for permission to market their axes as metal axes’

T&E @transportenvironment.org · 21h

LEAK: Car industry demands would cut EV sales in half & turn Europe’s car regulation into ‘Swiss cheese – full of holes’, according to T&E analysis of a leaked industry position paper.

This position will completely undermine the investment certainty needed for Europe to catch up in the EV race.
🧵

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David Ho @davidho.bsky.social · 21h

We will have a webinar on October 23, 2025 to discuss the Principles for Responsible and Effective Marine Carbon Dioxide Removal Development and Governance.

Sign up here: hub.wri.org/events/2025/...

The image features a blue paper titled "Principles for responsible and effective marine carbon dioxide removal development and governance." It includes the logos of the High Level Panel for a Sustainable Ocean Economy and details about the lead coordinating authors, lead authors, and contributors. 🌊

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Damien Meadows @damienmeadows.bsky.social · 23h

Great article from @hannahritchie.bsky.social… and the EU ETS can fund action to reduce these non-CO2 climate impacts from aviation (and from shipping - where black carbon has a GWP of 900). It’s really good that this is getting more public attention

Chris Rose @campaignstrat.bsky.social · 1d

Eliminating contrails from flying could be incredibly cheap, by @_HannahRitchie
substack.com/@hannahritch...

Eliminating contrails from flying could be incredibly cheap

Could we halve aviation's climate impact at a fraction of the cost of sustainable aviation fuels?

substack.com

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Jacob Edenhofer @jacobedenhofer.bsky.social · 1d

Some thoughts on the strategic logic behind Kemi Badenoch’s announcement that she’d scrap the Climate Change Act (CCA).
It serves two functions:
1️⃣ It appeals to lukewarm pivotal voters in marginal seats sceptical of costly green measures.
2️⃣ It is designed to
www.theguardian.com/environment/...

Kemi Badenoch vows to repeal Climate Change Act

Tory leader says she would replace it with ‘cheap energy’ strategy, ending decades-long consensus on climate

www.theguardian.com

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Mattias Söderberg @matsod.bsky.social · 1d

Happy to work in an NGO where #climatechange is such a strong cross-cutting focus. Read our new publication, and learn how we address the climate crisis through programs, advocacy, internal policies and civil society engagement
www.noedhjaelp.dk/wp-content/u...

www.noedhjaelp.dk

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☠️deadward niedermurder☠️ @niedermeyer.online · 1d

Waymo's success is remarkable proof of the power of AI. It's also remarkable proof of its limitations. Waymo's need for limited domains and powerful perception hardware, and the failure of Tesla's "AI-first" approach without them, holds powerful lessons about the limits of probabilistic inference.

Great Depression (nightcore remix) @bluespacecanary.bsky.social · 1d

It's fascinating to me that there's a whole "AI skeptic" misinformation ecosystem out there that somehow continues to deny that Waymo exists. Like, this is easy to fact check! Waymo runs publicly-available service in 5 cities, you can just go look up how it works and see it's not planned routes!

A bluesky post with the user's handle cropped out: "In 2015, I was told, confidently, that AI would end human drivers in the trucking industry w/in 5 years.

[Begin my highlight]10 years later, and there’s what-some experimental cabs rolling around a few cities in heavily-engineered preset routes?[end my highlight]

Not to mention the fact that the AI industry itself is Enron on heroin."

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Pavel @spavel.bsky.social · 1d

Flying cars are the perfect example of a point solution: trying to solve a systemic problem (traffic) with an individual product (fly over the traffic).

But traffic is not a technology problem; it's a social problem. Remote work, congestion fees, and dense transit-connected housing solve it better.

ae @aelkus.bsky.social · 1d

which then begs the question of why you want flying cars instead of whatever mass transportation equivalent you imagine

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Patrick Siegman @siegman.biz · 1d

Parking first, nuns last:

“The council also refused planning permission as the lack of on-site car parking spaces for the proposed development would be seriously deficient.”

Dublin City Council refuses planning permission for nun retirement accommodation | BreakingNews

The City Council has refused planning permission to Keith Craddock's Granville Developments Ltd for the three-storey residential accommodation at Haddington Place on a site to the rear of Sisters of t...

www.breakingnews.ie

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Jaap Burger @jaapburger.eu · 1d

“Taken together, these flexibilities could reduce the number of pure electric cars sold in 2035 by 7 to 38%.”

@transportenvironment.org’s deconstruction of all 'flexibilities' currently on the table to dilute the EU's CO2 standards for new vehicles.

Bend or break time for Europe’s 2035 car CO2 rules

Gutting the EU’s car CO2 rules would not just remove a key pillar of the European Green Deal, it would consign Europe’s carmakers to the car museum as well

www.transportenvironment.org

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Ketan Joshi @ketanjoshi.co · 2d

The @iea.org's guess at the variable renewable energy share in various countries by 2030 - Denmark will be around 78%.

None of this was meant to be even remotely possible!!

iea.blob.core.windows.net/assets/48ecc...

a chart showing various VRE shares by region

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Gernot Wagner @gwagner.com · 1d

One of the nuttier misconceptions about city life: hostile to kids.

Ever ask a 10-year-old whether she'd rather take the New York subway to visit her friends after school, or be stuck at home in her own bedroom upstairs, scrolling through the life that could have been?

John Pfaff @johnpfaff.bsky.social · 1d

The 912,000 children in NYC public schools make the city’s public schools the 16th biggest city in the US (a little behind Columbus’s 933,000, ahead of Indy’s 890,000).

Kudos to gay couples for really ramping up having kids—y’all are going to solve the fertility crisis!

Or these guys are nuts.

Berny Belvedere @bernybelvedere.bsky.social · 1d

fellas is it gay to live in a city

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Dan Rutherford @rutherdan.bsky.social · 1d

Do any of these apply to you?
✅Low hanging fruit makes my mouth water.
✅I think I'm contrail curious.
✅I'm just looking for a short-term fix.

If so, join this @theicct.org webinar about our new aviation decarbonization study covering contrails.

Register here: theicct.org/event/aviati...

Aviation Vision 2050: The Potential for Climate Neutral Growth - International Council on Clean Transportation

theicct.org

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Søren Have @sorenhave.dk · 1d

Some amount of negative emissions will be needed to achieve climate neutrality, and more to go net-negative.

How to develop a 'healthy' market for this?

Together with @carbongap.bsky.social my CONCITO-colleagues have analysed 3 policy options to move ahead:
carbongap.org/from-targets... #dkgreen

From Targets to Tonnes: Exploring Compliance Options to Drive Lasting Demand for Carbon Removals in the EU - Carbon Gap

This report presents quantitative and qualitative insights based on modelling by CONCITO to derive key considerations for real-world policies. We present and analyse three policy design options for ge...

carbongap.org

Søren Have @sorenhave.dk · 1d

Ping @lloydalter.bsky.social

Søren Have @sorenhave.dk · 2d

Huge news re sustainability of the built environment:

The Villum Foundation intends to invest DKK 1 billion over 10 years in a new research programme "that will explore new solutions to promote sustainability in the construction sector".

Read more here: villumfonden.dk/en/nyhed/bil... #dkgreen

Billion-kroner research grant to accelerate the green transition of the built environment

With a record-breaking research grant from the Villum Foundation, Aalborg University, Aarhus University, the Technical University of Denmark and the University of Southern Denmark are joining forces t...

villumfonden.dk

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David M Levinson ⁂ @transportist.net · 2d

All Scientific Knowledge is Heuristic – Science as Structured Approximation

Series index: A heuristic is a rule-of-thumb or disciplined shortcut that guides reasoning, decision-making, or discovery under uncertainty. By ignoring some variables to make others tractable, heuristics turn overwhelming complexity into workable problems. In science, this is not a drawback, it is the method itself (Box and Draper 1987). Models, measurements, and optimisations rely on […]

dlvr.it

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Søren Have @sorenhave.dk · 2d

Of course this would be a bad idea in terms of energy (and land) use.

Further, doing this 👆🏻 would be a huge disservice to not only consumers, but also employees and shareholders. Because electrification will win, as it is cheaper.

#dktrp #dkgreen

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Søren Have @sorenhave.dk · 2d

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Stefano Porciello @steporciello.bsky.social · 2d

Germany and Italy have joined forces to push for changes to the EU’s 2035 ban on tailpipe emissions from new cars, urging that vehicles “powered by renewable fuels” remain “eligible for registration” after the deadline, according to a joint memo obtained by Euractiv.