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Soemano Zeijlmans

@soemanozeijlmans.eu
86 followers 97 following 50 posts

💊 Welfare-pilled utility maxxer 🔍 Environmental economist building a better world with evidence instead of vibes. 💚 Research Associate at @GivingGreen.earth 🌍 Co-director of @EffectiveEnvironmentalism.org 🎒 Offbeat travel, nature, connections. 🏃‍♂️ Running

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Soemano Zeijlmans @soemanozeijlmans.eu · 26/08/2026
We're hiring a Director of Growth at @givinggreen.earth. Come join our team and help grow high-impact giving to tackle climate change! www.givinggreen.earth/careers
givinggreen.earth
Careers | Giving Green
Interested in joining Giving Green's team of climate researchers? See our open roles.
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Soemano Zeijlmans @soemanozeijlmans.eu · 17/07/2026
What if the biggest market failure is one that your economics professors won't even mention? A new article by @stijnbruers.bsky.social suggests it might be animal suffering, if we set the costs based on the experiences of animals rather than humans' altruistic preferences. doi.org/10.1108/IRER...
doi.org
Determining an optimal animal welfare levy
A literature review is conducted of five recently developed methodologies to determine an optimal non-anthropocentric animal welfare levy that internalizes the social costs of animal suffering into th...
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Soemano Zeijlmans @soemanozeijlmans.eu · 17/07/2026
🦟 If there's one video you should watch this weekend, let it be this one. In 1955, 150 men met in a nondescript lecture hall in Mexico City, thinking they were going to save the world from malaria. Sub-Saharan Africa was left off the map, but we can still fix this. www.youtube.com/watch?v=BJYf...
youtube.com
The Deadliest Decision You've Never Heard of
YouTube video by Justin Portela
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Effective Environmentalism @effectiveenvironmentalism.org · 18/03/2026
The latest effective environmentalism newsletter is now available on Substack! Not subscribed yet? Leave your email for monthly insights into effective climate action. effectiveenvironmentalism.substack.com/p/low-hangin...
effectiveenvironmentalism.substack.com
There's a lot of low-hanging fruit
There are millions of people working on climate, but some of the lowest-effort highest-impact projects still aren't being picked up.
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Giving Green @givinggreen.earth · 24/02/2026
📣Giving Green has launched new research & Top Biodiversity Nonprofits, @gfi.org & @wetlandsint.bsky.social! 📣 We identified high-impact strategies on land & sea: 🌱 Alt. proteins + wetlands protection 🌊 Bycatch reduction + FMFO alternatives 🔎Learn more: tinyurl.com/nhxbwtse
tinyurl.com
Giving Green Launches New Biodiversity Research and Top Biodiversity Nonprofits  | Giving Green
Learn about Giving Green's new research on effective biodiversity donations and Top Biodiversity Nonprofits
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emily thai @ethai.bsky.social · 11/11/2025
men will literally pledge 10% of their lifetime income to highly effective charities before going to therapy
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Rutger Bregman @rutgerbregman.com · 25/11/2025
I wish I didn’t have to share this. But the BBC has decided to censor my first Reith Lecture. They deleted the line in which I describe Donald Trump as “the most openly corrupt president in American history.” /1
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Giving Green @givinggreen.earth · 06/10/2025
We’re flying the nest! 🦋 Giving Green is now an independent nonprofit, with a fresh brand & site to match. Huge thanks to IDinsight for supporting our growth since we were a side project 💚 Learn more: tinyurl.com/yc5eyvx6
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Giving Green @givinggreen.earth · 02/07/2025
🌿 How can #philanthropy best support #biodiversity? Our latest consulting project will explore: 💸 The philanthropic opportunity 🏞️ 2 focus areas: land use change & wild species exploitation 💪The top biodiversity nonprofits 🔗 More here: tinyurl.com/yc3u5ze6
tinyurl.com
Preview: upcoming research into philanthropic strategies for biodiversity | Giving Green
An introduction to an upcoming body of research that will examine high-impact philanthropic strategies to protect biodiversity and the ecosystem services it supports.
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Soemano Zeijlmans @soemanozeijlmans.eu · 02/07/2025
The latest EE newsletter is fresh in your inboxes!
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Ruben Dieleman @dieleman.bsky.social · 06/06/2025
🌳 The latest @effectiveenvironmentalism.org newsletter edition is packed with content! - A new career guide for building a high-impact career 🧩 - What we’ve been reading and listening to 🗞️ - Some great job openings and opportunities! 🔭 Check it out!👇
effectiveenvironmentalism.substack.com
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Soemano Zeijlmans @soemanozeijlmans.eu · 21/05/2025
Next Tuesday I'll join the 10% Club in Eindhoven (NL) at their event about how your donations can drive key innovations to reach net-zero emissions. With exciting speakers from Doneer Effectief and Future Cleantech Architects! Tickets via the link below. lu.ma/r2wksqzn
lu.ma
Accelerate Climate Innovations · Luma
Climate change affects us all and there are many charities to raise the alarm and address it. However, which innovations are needed to close the gap towards…
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The Good Food Institute @gfi.org · 16/05/2025
👩🏼‍🔬The scientific ecosystem—especially around cultivated meat—reported major breakthroughs in 2024, and faster than expected. Download the full report 👉 bit.ly/4jVLSEF Look below for a few highlights that shaped 2024 ⤵️
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The Good Food Institute @gfi.org · 21/04/2025
As GFI's @emmaiggie.bsky.social explains, Avian flu outbreaks like the one we're experiencing now are not a fluke — they're a recurring problem that is unlikely to stop until we diversify our protein supply with new, animal-free methods of production. Learn more: www.fooddive.com/news/eggs-bi...
fooddive.com
Bird flu is a recurring risk. It’s time food companies planned for it.
As egg prices remain volatile, businesses should think about embracing alternatives to the protein, writes Emma Ignaszewski of the Good Food Institute.
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Andrew Dessler @andrewdessler.com · 08/04/2025
This seems bad. Over time, what people have assumed was the physical limit of human heat tolerance keeps going down. It used to be thought it was a wet-bulb of 35C, now it seems it's more like 32C for resting humans and 27C for people doing minimal physical activity. www.pnas.org/doi/10.1073/...
Abstract
Recent projections suggest that large geographical areas will soon experience heat and humidity exceeding limits for human thermoregulation. The survivability limits modeled in that research were based on laboratory studies suggesting that humans cannot effectively thermoregulate in wet bulb temperatures (Twb) above 26 to 31 °C, values considerably lower than the widely publicized theoretical threshold of 35 °C. The newly proposed empirical limits were derived from the Twb corresponding to the core temperature inflection point in participants exposed to stepped increases in air temperature or relative humidity in a climate-controlled chamber. Despite the increasing use of these thermal-step protocols, their validity has not been established. We used a humidity-step protocol to estimate the Twb threshold for core temperature inflection in 12 volunteers. To determine whether this threshold truly demarcates the Twb above which thermoregulation is impossible, each participant was subsequently exposed to Twb above (~33.7 °C, Tabove) and below (~30.9 °C, Tbelow) their respective inflection point (~32.3 °C, Twb) for up to 9 h (in random order). Core temperature rose continuously in Tabove. It was projected that core temperatures associated with heat stroke (40.2 °C) would occur within 10 h. While Tbelow was also uncompensable, the core temperature rate of rise was considerably lower than in Tabove such that it would take >24 h to reach 40.2 °C. Our study supports thermal-step protocols as an effective technique for evaluating survivability limits for heat exposure and provides a direct assessment of the limits of human thermoregulation.
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Hank Green @hankgreen.bsky.social · 07/04/2025
A tricky thing about modern society is that no one has any idea when they don’t die. Like, the number of lives saved by controlling air pollution in America is probably over 200,000 per year, but the number of people who think their life was saved by controlling air pollution is zero.
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De Correspondent @decorrespondent.nl · 01/04/2025
Twee jaar geleden had correspondent Simon van Teutem een contract van consultancybureau McKinsey in handen — een heilige graal voor talloze ambitieuze leeftijdsgenoten. Een paar jaar buffelen, vertelde hij zichzelf, om daarna iets echt betekenisvols te doen voor de wereld.
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Soemano Zeijlmans @soemanozeijlmans.eu · 05/04/2025
LinkedInfluencers are posting about how AI image generation can lead to false receipts. But no-one is talking about the real problem: how AI can create fake LinkedIn posts about these receipts. Will AI replace LinkedIn influencers? 🤔
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Andrew Dessler @andrewdessler.com · 30/03/2025
Climate economists: Does any economist think that economic model estimates of good enough that they should guide our policy response? e.g., "economic models predict GDP declines of a few percent in 2100 from 3C of warming, so we don't need to work hard to avoid this."
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Giving Green @givinggreen.earth · 07/03/2025
🚨 We're #hiring! 🚨 📌 #Research Associate/Senior Researcher to drive evidence-based #climate giving 📌 Experts to support projects in #biodiversity & #PuertoRico climate landscape 🔗 Apply: tinyurl.com/46xb2dzk 📩 Questions/interest: givinggreen@idinsight.org Boost & tag!
tinyurl.com
Careers | Giving Green
The latest climate career opportunities with Giving Green.
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Soemano Zeijlmans @soemanozeijlmans.eu · 27/02/2025
it's a bop
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Rutger Bregman @rutgerbregman.com · 25/02/2025
The blood that Elon Musk and his DOGE-cronies have on their hands because of the PEPFAR Funding Suspension. 200.000+ people not getting their daily HIV medication. 15.000+ deaths and counting.
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Soemano Zeijlmans @soemanozeijlmans.eu · 26/02/2025
Meanwhile, the actual EA community is fuming about the PEPFAR cuts and has set up an emergency fund to continue coverage. Elon is a just a loser who likes to act quirky. He found EA cool once because of the tech nerds but ultimately found out that nazism is a much better fit for him.
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Ruben Dieleman @dieleman.bsky.social · 17/02/2025
This has been on my mind a lot, recently: What if climate change will get much worse than we think? Find the @effectiveenvironmentalism.org article here, in our latest newsletter. 🗞️ effectiveenvironmentalism.substack.com/p/what-if-cl...
effectiveenvironmentalism.substack.com
What if climate change will get much worse than we think?
There is a non-negligible chance that climate change will be catastrophic. We need to be prepared. Also: exciting opportunities, interesting articles, and hot takes!
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Margriet Oostveen @moostveen.bsky.social · 17/02/2025
Veel berichten over de opkomst van populistisch rechts gaan over manieren om kiezers op andere gedachten te brengen: alsof alleen zíj moeten veranderen. Terwijl je ook de gevolgen van je eigen hoogopgeleide positie eens wat vaker zou kunnen onderzoeken. Mijn eerste stuk voor @decorrespondent.nl
decorrespondent.nl
In Holland staat een zuil: hoe hoogopgeleiden zich steeds meer afzonderen van de rest van Nederland
In een halve eeuw groeide het aantal hoogopgeleiden in Nederland explosief. Daarnaast isoleren zij zich steeds meer: eigen sportclubs, eigen scholen, eigen media, eigen wijken. Deze ‘verzuiling’ blijf...
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Soemano Zeijlmans @soemanozeijlmans.eu · 09/02/2025
The @signal.org app is now the most downloaded app in NL! Let's ditch WhatsApp and chat securely :) signal.org/install
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Simon van Teutem @simonvanteutem.bsky.social · 05/02/2025
Wonderbaarlijk dat elk nieuwsmedium dat ik tot nu toe heb gezien de term 'etnische zuivering' vermijdt in de kop en de lead over Trumps uitdrukkelijke voorstel tot etnische zuivering. www.nrc.nl/nieuws/2025/...
nrc.nl
Het plan om van Gaza een Amerikaanse kustplaats te maken schokt de regio
Gaza: De suggestie van de Amerikaanse president Trump om de Gazastrook vrij van Palestijnen te maken om het door de VS te laten ontwikkelen tot Riviera, kan een eind aan het bestand tussen Israël en H...
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Soemano Zeijlmans @soemanozeijlmans.eu · 05/02/2025
Tellen specials ook, @grotepodcastlas.bsky.social? (En kunnen jullie raden waar dit is?)
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Ken Opalo @kopalo.bsky.social · 05/02/2025
Ethnic cleansing is bad.
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Brigid ag Rithallaigh @brigidagrith.bsky.social · 29/01/2025
A good reminder that cycle lanes and footpaths don't appear congested as they (mostly) allow people to move through quickly and efficiently. Video taken from charlemont luas stop on a rainy morning.
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Hannah Ritchie @hannahritchie.bsky.social · 28/01/2025
More than 20 million people receive treatment for HIV through PEPFAR, the US Aid Relief Program. This is being rolled back, and doing so will cost many lives.
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Soemano Zeijlmans @soemanozeijlmans.eu · 26/01/2025
Here's an #EffectiveAltruism starterpack with accounts in global health, development, animal welfare, climate change, and EA-meta! DM or reply for suggestions. go.bsky.app/N5spcdc
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Effective Environmentalism @effectiveenvironmentalism.org · 25/01/2025
What drives mountaineer Jennifer Stratton (@mieuxdonner.org) to fundraise for the world's most effective climate charities? "Climate change is an issue close to my heart, particularly as I live in the Alps and witness the glaciers retreating year after year." A thread 🧵👇
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Soemano Zeijlmans @soemanozeijlmans.eu · 22/01/2025
DeepSeek is a truly promising LLM but I feel like it could use some further training in some respects ;)
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Soemano Zeijlmans @soemanozeijlmans.eu · 21/01/2025
With Big Tech now ruling the U.S. unchecked, this is a great time to install an adblocker to cripple the power of Meta, X, and Google. uBlock origin is free and open-source and available for Firefox and Chrome: ublockorigin.com
ublockorigin.com
uBlock Origin - Free, open-source ad content blocker.
uBlock Origin is not just an “ad blocker“, it's a wide-spectrum content blocker with CPU and memory efficiency as a primary feature. Developed by Raymond Hill.
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Effective Environmentalism @effectiveenvironmentalism.org · 11/01/2025
🇺🇸 US: Food Policy Pathways is a newly-launched non-profit helping talented people pursue impactful careers in food policy within city, state, and federal governments. www.foodpolicypathways.org
foodpolicypathways.org
Food Policy Pathways
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Effective Environmentalism @effectiveenvironmentalism.org · 11/01/2025
Madrid has grown its metro system faster and cheaper than almost any other city. It's now the third longest one in Europe. What can we learn from Madrid for building #climate friendly mass transport? 🧵👇 @hopkinsonben.bsky.social for @worksinprogress.bsky.social: worksinprogress.co/issue/how-ma...
worksinprogress.co
How Madrid built its metro cheaply - Works in Progress
Madrid tripled the length of its metro system in just 12 years — faster and cheaper than almost any other city in the world. What can its expansion teach other cities?
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Soemano Zeijlmans @soemanozeijlmans.eu · 04/01/2025
Will a carbon tax lead to a Small Animal Replacement Problem? We might substitute beef with chicken, leading to more animals being killed. But we probably won't. Read my pre-print on @ssrn.bsky.social: papers.ssrn.com/sol3/papers.... #carbontax #animalwelfare #economics
papers.ssrn.com
Carbon and Slaughter Taxes for Meat: Modelling trade-offs between climate change and animal welfare
<span>To reduce food systems emissions, economists and policymakers have called for carbon pricing on food products. This climate policy could lead to substitut
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Soemano Zeijlmans @soemanozeijlmans.eu · 04/01/2025
I wrote a post on the EA forum about whether a carbon tax will lead to more animals (mostly chickens) being slaughtered. A quantitative model: forum.effectivealtruism.org/posts/KbREam...
forum.effectivealtruism.org
Will a food carbon tax lead to more animals being slaughtered? A quantitative model — EA Forum
Does a food carbon tax increase animal deaths and/or the total time of suffering of cows, pigs, chickens, and fish? Theoretically, this is possible,…
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Giving Green @givinggreen.earth · 04/12/2024
Featuring our work and some exciting new research from one of our partners in effective giving!
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Soemano Zeijlmans @soemanozeijlmans.eu · 12/12/2024
Anyone else saw this things in geography class and was like fk yes i wanna travel there?
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Effective Environmentalism @effectiveenvironmentalism.org · 06/12/2024
What are the most promising philanthropic strategies to halt biodiversity loss? A report by Effektiv Spenden identifies four opportunities: 🧆 Alternative proteins ⛓ Supply chain transparency ⚖ Legal Action 💧 Wetland conservation Read a summary or the report: effektiv-spenden.org/en/blog/the-...
effektiv-spenden.org
The dual climate and biodiversity crisis | Effektiv Spenden
Biodiversity is in crisis. Donations should be geared more towards the highest impact opportunities.
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Effective Environmentalism @effectiveenvironmentalism.org · 06/12/2024
We've posted to the Effective Altruism Forum about our plans for Effective Environmentalism and budget needs. Check out our strategy here: forum.effectivealtruism.org/posts/C6es25...
forum.effectivealtruism.org
Effective Environmentalism has re-launched! (And we're looking for funding) — EA Forum
Effective Environmentalism has re-launched! Our aim is to make the environmental movement more effective by inspiring and enabling people to tackle climate change effectively.
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Effective Environmentalism @effectiveenvironmentalism.org · 03/12/2024
Our next newsletter is in your inbox now! Find out how your Giving Season donations can be exceptionally impactful if you donate to the most effective climate charities. We also cover research on effective biodiversity conservation. 📥 effectiveenvironmentalism.substack.com/p/the-worlds...
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