iiinova — where your digital self keeps evolving

Stephane Hallegatte @hallegatte.bsky.social · 09/09/2026

I understand that as the NS equations approach singularity, they will stop describing reality. Then we need to model the individual molecules and their interactions (which should bring the flow away from the singular behavior & back to the NS validity space, explaining the stability). Am I right?

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Clarkesworld @clarkesworldmagazine.com · 09/06/2026

Between now and October (our 20th anniversary issue), we're running a subscription drive and dedicating all new revenue toward improving pay for our staff, writers, artists, and contractors. Details on how to subscribe can be found here: clarkesworldmagazine.com/subscribe/

clarkesworldmagazine.com

Subscribe to Clarkesworld Magazine

Clarkesworld Science Fiction and Fantasy Magazine and Podcast.

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Stephane Hallegatte @hallegatte.bsky.social · 06/06/2026

one key question is the definition of degrowth: is it about GDP? Or about material consumption? If the latter, then there is little difference with green growth… See my debate with Jason: onlinelibrary.wiley.com/doi/epdf/10....

onlinelibrary.wiley.com

Can we live within environmental limits and still reduce poverty? Degrowth or decoupling?

Reader environment loaded

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Stephane Hallegatte @hallegatte.bsky.social · 05/04/2026

In 2022, the Pakistan CCDR identified the potential of solar (utility-scale and off-grid) to meet the country energy needs and objectives. It was certainly part of the conversation with the authorities at the launch of the report in November. openknowledge.worldbank.org/server/api/c...

openknowledge.worldbank.org

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Stephane Hallegatte @hallegatte.bsky.social · 03/03/2026

Thanks for sharing! An important piece of evidence for the fact that the people opposing a policy are not necessarily the same as the people negatively affected. Winner/Loser analyses are not enough. It was one key conclusion of our report on the political economy of climate action.

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🎃 🕯️ Monica Valentinelli is Sipping Tea. 🐈‍⬛ ☕ @booksofm.com · 20/11/2025

If you use GMail, AI (Gemini) was turned on yesterday by default and now scans all of your content for machine learning. To turn off, go to Settings>General and scroll down. Uncheck the box for "Smart features." There's other "Smart" add-ons as well, but that's the one that reads your content.

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The EBRD @ebrd.bsky.social · 13/11/2025

Moderated by @hallegatte.bsky.social of the World Bank, the conversation included voices from Zambia, Pakistan and Moldova - our country of operation - we were pleased to see Secretary of State Aliona Rusnac join the dialogue.

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Stephane Hallegatte @hallegatte.bsky.social · 09/11/2025

And if you attend COP30, see here the events we organize, including the CCDR Summary launch tomorrow

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Stephane Hallegatte @hallegatte.bsky.social · 09/11/2025

However, while the aggregate effect is expected to be small, countries need to prepare for significant sectoral and regional shifts. The report highlights measures to reduce five frictions that prevent workers to adjust to a rapidly changing labor market: skills, space, time, norms, and wages.

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Stephane Hallegatte @hallegatte.bsky.social · 09/11/2025

At the same time, the shift to low-emission development pathways, with emissions reduced by 71 percent by 2050, would have a small and most of the time positive impacts on GDP and labor income.

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Stephane Hallegatte @hallegatte.bsky.social · 09/11/2025

Key highlights include that climate adaptation could yield labor income benefits equivalent to 150 million jobs by 2050, a combination of new jobs created by investments in infrastructure or nature-based solution and jobs that are protected from negative shocks and impacts.

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Stephane Hallegatte @hallegatte.bsky.social · 09/11/2025

The 4th “Country Climate and Development Report” summary is out, covering 93 economies, with a focus on jobs. This report is unique in that it is based on dozens of individual-country reports, each prepared (and reviewed) individually.

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Stephane Hallegatte @hallegatte.bsky.social · 10/10/2025

Thanks to renewable power expansion, fuel-importing countries saved more than $1.3tn between 2010 and 2023 that would otherwise have been spent on fossil fuels from overseas. Important contribution from @iea.org to current debates!

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Sébastien Gobert @sebagobert.bsky.social · 29/09/2025

Une terrible nouvelle! Personnellement il me semble que ça va contre le “sens de l’Histoire”. Encore plus personnellement je vais amèrement regretter cette ligne dans mes transits réguliers entre l’Ukraine et la France (en train c’est top) Ouf: Reste le train de nuit Vienne-Bruxelles

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Centre for Complex Systems Studies @ccss-uu.bsky.social · 16/06/2025

Two new recordings online! CCSS Meeting #73: Defining and measuring socioeconomic resilience by dr. @hallegatte.bsky.social Science Jam #62: Temporal Networks of Human Interactions by Prof. dr. @jsaramak.bsky.social Please check out our YouTube channel www.youtube.com/@centreforco...

youtube.com

Centre for Complex Systems Studies Utrecht

The Centre for Complex Systems Studies (CCSS) brings together the complexity research of Utrecht University. The centre aims at scientific breakthroughs as well as novel solutions for societally relev...

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Stephane Hallegatte @hallegatte.bsky.social · 30/05/2025

How do we estimate climate change macroeconomic risks in The World Bank's Country Climate and Development Reports? We just published a methodological paper that presents a methodology used in many of them, with our partners at Industrial Economics (IEc). documents1.worldbank.org/curated/en/0...

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Stephane Hallegatte @hallegatte.bsky.social · 15/04/2025

Renewable energy offers an opportunity to bring electricity to people who are hard to reach with fossil fuels, and to create jobs and reduce poverty. It is also chance to boost resilience to natural disasters and climate change. Blog post on our M300 initiative: blogs.worldbank.org/en/climatech...

blogs.worldbank.org

Mission 300: Connecting 300 million people to electricity and building a resilient future in Africa

By scaling investment, Mission 300 is a critical foundation for bridging the energy access and adaptation gaps, paving the way for better jobs, and more prosperous and resilient communities across Afr...

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Stephane Hallegatte @hallegatte.bsky.social · 11/04/2025

Congratulations to Bina! A well deserved award: her research has been and will continue to be very influential in India and beyond!

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Thiemo Fetzer 🇪🇺🇺🇦 - same handle elsewhere @trfetzer.com · 21/03/2025

Happy to attend the @cepr.org Workshop on People’s Understanding of and Support for Economic Policies workshop at St Gallen. I ll share some thoughts on this carefully curated workshop in this thread.

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Stephane Hallegatte @hallegatte.bsky.social · 11/03/2025

From WB colleagues, an assessment of firm-level vulnerability and adaptation. Based on 160,000 firms, they find they small and medium-size firms in low- and low-middle income countries see revenues decline by 12% when temperatures are 0.5◦C above average. documents.worldbank.org/en/publicati...

documents.worldbank.org

Firm-Level Climate Change Adaptation : Micro Evidence from 134 Nations

Are firms adapting to climate change? This paper studies this question by combining geocoded World Bank Enterprise Survey data with spatially granular weather data to .

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Stephane Hallegatte @hallegatte.bsky.social · 10/03/2025

CCDRs now cover 72 economies, each with its own modeling, and their preparation include the iterative aspects mentioned in the paper, both across disciplines (eg energy and macro) and btw modelers and decision makers. www.worldbank.org/en/publicati...

worldbank.org

Country Climate and Development Reports (CCDRs)

The World Bank Group’s Country Climate and Development Reports (CCDRs) are new core diagnostic reports that integrate climate change and development considerations.

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Stephane Hallegatte @hallegatte.bsky.social · 10/03/2025

curious to hear what you think of the modeling approach deployed in CCDRs, in which different parts of the systems are modeled separately (to keep modeling manageable and sufficiently detailed), with a macro analyses validating the feasibility and estimating financial and macro implications…

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Stephane Hallegatte @hallegatte.bsky.social · 08/03/2025

An obsession for a long time: many policy goals interact strongly in urban setting. In a case study on Paris, we show that you need a combination of policies to combine housing affordability, low emissions, and resilience. www.nature.com/articles/ncl...

nature.com

Trade-offs and synergies in urban climate policies - Nature Climate Change

Urban climate policies interact with socio–economic policy goals. These interactions can lead to trade-offs or synergies, but have been rarely analysed. Now research provides a quantification of these...

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Stephane Hallegatte @hallegatte.bsky.social · 25/01/2025

La saga inachevée des ordinateurs TO7 et MO5, un éphémère succès français. nostalgie…

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Lauren Orso @laorso.bsky.social · 23/01/2025

A joy to visualise this good climate news ☀️ Solar is growing in every EU country and, for the first time in 2024, generates more electricity than coal. Plenty more powerful and positive insights in @ember-energy.org's European Electricity Review 2025 out today ➡️➡️➡️ ember-energy.org/latest-insig...

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e-axes.org @e-axesforum.bsky.social · 20/01/2025

📣Our upcoming webinar with Adam Bauer explores his research with @hallegatte.bsky.social and Florent McIsaac and asks: Should we delay for coordinated climate policies or implement uncoordinated ones now? 📅Jan 27 ⏰11am EST, 4pm GMT, 5pm CET 🔗https://bit.ly/3WpEQhQ #ClimateChangeMitigation

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

Finally, a recent working paper, looking at the trade-off between the timing of climate action and the perfect allocation of action across sectors. It shows that timing dominates: in general, one should not delay action to enhance allocation across sector. documents1.worldbank.org/curated/en/0...

documents1.worldbank.org

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

Also happy to finally see the paper on the macroeconomic and monetary impacts of big disasters published in Economic Modeling: www.sciencedirect.com/science/arti...

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

The report highlights all the potential benefits from a more coordinated approach across countries, to maximize the positive effects (eg, access to green technologies) and minimize the negative ones (eg, excluding poor countries from trade).

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

We also published an important report with our colleagues from WTO, IMF, OECD, and UNCTAD, on the cross-border (positive and negative) impacts of climate policies. www.wto.org/english/res_...

wto.org

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

It introduces the new indicator "proportion of people at high risk from climate hazards", showing that 1.2 billion people are in such situation in the world. The preprint of the technical paper with all the details is here: www.researchsquare.com/article/rs-5...

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

But any development is not enough: the report highlights 30 examples of private sector adaptation and 9 case studies of adaptation public policies.

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

It shows that every 10% increase in income reduces the number of people living at high risk from climate hazards by 100 million. Overall, development reduces vulnerability, for any metric.

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

We have also published a special report focused on Adaptation and Resilience: "Rising to the Challenge". It frames successful adaptation as three parallel endeavors: faster development, better development, and targeted adaptation. www.worldbank.org/en/publicati...

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

Are those reports useful? We did a review of how some of our first CCDRs have been used and have influenced real-world decisions. We find 5 different modalities through which CCDRs have an impact. See the short note: documents1.worldbank.org/curated/en/0...

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Stephane Hallegatte @hallegatte.bsky.social · 31/12/2024

And more reports confirm previous findings: a resilient low-emissions development pathway can have the same economic growth as current trends. Decarbonization does not require to compromise on growth and poverty reduction.

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