Christian Flachsland
@chflachsland.bsky.social
8K followers 3.5K following 400 posts
Professor of Climate Policy, Hertie School Centre for Sustainability
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chflachsland.bsky.social
"A growing number of studies have found that the most widely used offset programs continue to greatly overestimate their probable climate impact often by a factor of five to ten or more. "
www.annualreviews.org/content/jour...
Reposted by Christian Flachsland
wahlrecht.de
Sonntagsfrage zur Landtagswahl in Mecklenburg-Vorpommern • Infratest dimap / NDR: AfD 38 % | SPD 19 % | CDU 13 % | DIE LINKE 12 % | BSW 7 % | GRÜNE 5 % | Sonstige 6 %
➤ Verlauf: wahlrecht.de/umfragen/lan...
🗓️ Landtagswahl: 20. September 2026
#ltwmv
Säulendiagramm der Sonntagsfrage zur Landtagswahl in Mecklenburg-Vorpommern von Infratest dimap für den NDR
Reposted by Christian Flachsland
chflachsland.bsky.social
Update of perhaps my favorite global climate policy indicator: The production gap report.

In fact, the gap between countries' planned fossil fuel extraction and global climate targets has widened.

Turning the tide on these indicators is essential for climate policy success.

productiongap.org
chflachsland.bsky.social
I hope the initiative will be underpinned by some cold-blooded political economy analysis to make it effective...

It's just a tough problem - doesn't mean it can/should not be tackled.
Quite the opposite, imho.
chflachsland.bsky.social
Update of perhaps my favorite global climate policy indicator: The production gap report.

In fact, the gap between countries' planned fossil fuel extraction and global climate targets has widened.

Turning the tide on these indicators is essential for climate policy success.

productiongap.org
Reposted by Christian Flachsland
tomnuttall.bsky.social
For the first time the AfD has nudged ahead of the Union in this national polling aggregator, perhaps Germany's most reliable. Beware cope about the AfD losing this or that mayoral election, including in NRW this coming weekend. Something important is shifting.
btwahltrend.bsky.social
CDU/CSU 25,4
AfD 25,6
SPD 14,6
Grüne 11,2
Linke 10,8
BSW 3,9
FDP 3,1
FW 1,6

pollytix.de/wahltrend
@pollytix.bsky.social
Reposted by Christian Flachsland
ipcc.bsky.social
Registration for experts interested in serving as Expert Reviewers and providing scientific comments on the First Order Draft of the Special Report on Climate Change and Cities is now open!

Register here: apps.ipcc.ch/comments/src...
⚠️ Registration closes 30 Nov2025

🔗 www.ipcc.ch/2025/09/17/p...
chflachsland.bsky.social
Welcome to the Hertie School @climatemorgan.bsky.social!
hertieschool.bsky.social
We're excited to welcome Jennifer Morgan as a new Fellow at the Hertie School! 🌍

She'll bring her global climate policy expertise to our teaching and research, working closely with the Centre for Sustainability.
Reposted by Christian Flachsland
hertieschool.bsky.social
We're excited to welcome Jennifer Morgan as a new Fellow at the Hertie School! 🌍

She'll bring her global climate policy expertise to our teaching and research, working closely with the Centre for Sustainability.
chflachsland.bsky.social
Welcome Theodore, we are very happy to have you!
Reposted by Christian Flachsland
theodoretallent.bsky.social
A new chapter starts today ✨️
As I'll be completing my PhD this year, I just started a new position at the @hertieschool.bsky.social as a Research Associate at their Centre for Sustainability.
An exciting year between Paris and Berlin, from the end of the PhD to the beginning of something new 🙌
Reposted by Christian Flachsland
mkreutzfeldt.bsky.social
Im "Anti-Klima-Tracker", einer neuen Webseite, die letzte Woche online ging, kritisieren die Grünen klimapolitische Entscheidungen der Bundesregierung. Doch einige der dort gemachten Aussagen sind irreführend oder unzutreffend. Dazu ein Faktencheck: (1/12) www.gruene.de/politik-fuer...
Text: 
Anti-Klima-Tracker
Wir schauen dieser neuen Bundesregierung Merz mit unserem Anti-Klima-Tracker kritisch auf die Finger! In Regierungsverantwortung haben wir GRÜNE in den letzten Jahren einen Klima- und Transformationsfonds entwickelt, der wichtige Vorhaben für mehr Klimaschutz – und damit mehr Schutz für uns alle vor den schlimmsten Folgen der Klimakrise – in Deutschland angestoßen hat. Die Regierung Merz hätte die Möglichkeit, diese Erfolge auszubauen. Doch statt den Klimafonds für echten Fortschritt zu nutzen, wird er nun als „Verschiebebahnhof“ für ohnehin geplante Projekte aus dem Bundeshaushalt missbraucht. Erfolgreiche Programme zur klimaneutralen Modernisierung werden ausgebremst und Mittel stattdessen in die Subvention klimaschädlicher Geschäftsmodelle oder zweifelhafte Schaufensterprojekte umgeleitet – mit massiven Rückschritten beim Klimaschutz als Folge. Nur wenige Maßnahmen im Klima- und Transformationsfonds 2026 lassen noch Hoffnung auf echten Klimaschutz erkennen.
Reposted by Christian Flachsland
hertieschool.bsky.social
Henrik Enderlein, former President of the Hertie School and founding Director of the @delorsberlin.bsky.social‬, passed away four years ago today at the age of 46.

We remember Henrik as a visionary leader, professor, teacher and mentor.

Our thoughts remain with Henrik's family and friends today.
chflachsland.bsky.social
Very excited to join AR7 WGIII as Lead Author in Chapter 6 'Enablers & Barriers'.
ipcc.bsky.social
The #IPCC has announced the authors selected for its Seventh Assessment Report.

664 experts from 111 countries have been invited to participate as Coordinating Lead Authors, Lead Authors, & Review Editors.

🌍 51% from developing countries
🚺 46% women

🔗 bit.ly/AR7AuthorsPR
Reposted by Christian Flachsland
glenpeters.bsky.social
As of August, do we know what fossil CO2 emissions will do in 2025?

I made an estimate in July, using IEA projections of fossil fuel use, to estimate 0.8% growth in 2025.

Carbon Monitor has an estimate based on Jan-Jun data, 0.7%.

But what about countries?

www.eenews.net/articles/in-...

1/
Reposted by Christian Flachsland
kobihackenburg.bsky.social
Today (w/ @ox.ac.uk @stanford @MIT @LSE) we’re sharing the results of the largest AI persuasion experiments to date: 76k participants, 19  LLMs, 707 political issues.

We examine “levers” of AI persuasion: model scale, post-training, prompting, personalization, & more! 

🧵:
Reposted by Christian Flachsland
jacobedenhofer.bsky.social
The paper might sound nerdy, but it makes a broader point that I hope (political) economists take more seriously: institutions are not always constraints (though macro-level ones often are), sometimes they are choice variables for policymakers whose main purpose is not to directly influence
chflachsland.bsky.social
Working paper update 👇
Reposted by Christian Flachsland
conjugateprior.org
As next to nobody understands elasticity of demand, I propose calling increased car use from building an extra lane 'the Jevons effect', and increased biking from building bike infrastructure 'the Hidalgo effect'.

They differ only in whether we like the outcome, but hey, that's how all this works.
brenttoderian.bsky.social
Paris urban biking DOUBLED in just one year.

“Cycling in Paris has transcended mere trendiness; it’s become a fundamental aspect of the city’s identity. Despite challenges like inclement weather, cyclists continue to flock to the streets, setting new records and reshaping the urban landscape.”
Paris cycling numbers double in one year thanks to massive investment and it's not stopping
The report delves into the nuances of Parisian cycling culture, exploring the vibrant community of riders who navigate the city's streets
momentummag.com
Reposted by Christian Flachsland
Reposted by Christian Flachsland
claudiazwar.bsky.social
Our updated working paper with @jacobedenhofer.bsky.social and @chflachsland.bsky.social - Introducing and applying the Climate Institutions Analysis Framework (CIAF) - is now available ⬇️ all feedback welcome!
socarxivbot.bsky.social
Introducing and applying the Climate Institutions Analysis Framework (CIAF): A comparative analysis of climate institutions in Germany, the United Kingdom, Sweden, and Australia using the CIAF: https://osf.io/jf8ah