Daniel Bachler @danielbachler.de Head of Engineering at @ourworldindata.org; likes nuanced discourse, weird creatures and programming languages with ADTs
@raychaser.bsky.social @raychaser.bsky.social Also @raychaser@infosec.exchange — Co-Founder & CEO Perpetual Systems. Doggles fanatic. Opinions my own. he/him
Nick Sullivan @nicksullivan.org Asymmetries in action
LMU München @lmu.de Offizieller Account der Ludwig-Maximilians-Universität München
Geschwister-Scholl-Platz 1, 80539 München
Impressum: www.lmu.de/de/footer/impressum/index.html
Datenschutz: www.lmu.de/presse/socialmedia
Mauro Gilli @maurogilli.bsky.social Professor of Military Strategy and Technology at the Hertie School in Berlin. Great powers rivalry, future of war, tech competition. Born 🇮🇹, 9y 🇺🇸, 9y🇨🇭, 🇩🇪 https://sites.google.com/site/maurogilli2/
@pjmfdn.bsky.social @pjmfdn.bsky.social 
Unternet @unternet.co Building a new, intelligent web for everyone.
Claudia Zwar @claudiazwar.bsky.social PhD Candidate and Research Associate at Hertie School Centre for Sustainability
www.claudiazwar.com
Louis@ZeroTwentyFifty @zerotwentyfifty.bsky.social I'm Louis, the Founder of ZeroTwentyFifty. I write Open Source software to help adoption of the PACT Network to get organisations moving more Product Carbon Footprints around.
Bundesumweltministerium @umweltministerium.de Offizieller Kanal des BMUKN. Für den Schutz von Umwelt und Klima, für den Erhalt der Artenvielfalt und der einzigartigen Natur. 🌳
🔗 bundesumweltministerium.de/impressum
APELL @apell.info The European Open Source Software Business Association
IPCC @ipcc.bsky.social Intergovernmental Panel on Climate Change
Randall Munroe @xkcd.com 
Gigi (Susan) Danziger @gigidanziger.bsky.social Having serious fun
(fun doing serious work)
European Research Council (ERC) @erc.europa.eu European Research Council, set up by the EU, funds top researchers of any nationality, helping them pursue great ideas at the frontiers of knowledge. #HorizonEU
UN Environment Programme @unep.org Official account of the United Nations Environment Programme
https://www.unep.org/
UNDP @undp.org 
Bundesentwicklungsministerium @bmz.de Hier postet das Bundesministerium für wirtschaftliche Zusammenarbeit und Entwicklung (BMZ) / Entwicklungsministerium / www.bmz.de/soziale-medien
United Nations @handle.invalid 
Evgeny Morozov @evgenymorozov.bsky.social Hater of solutionism. Books: The Net Delusion; To Save Everything Click Here. Podcasts: The Santiago Boys. A Sense of Rebellion. Founder: The Syllabus. 
SINE Foundation @sine.foundation Our planet is a global Commons to be shared and cared for by all. We empower people and organizations to maintain our planet within safe limits: Our purpose is to facilitate a more collaborative and sustainable economy.
Leonie Wenz @leoniewenz.bsky.social Prof of Environmental Economics @TU Berlin, deputy head of Complexity Science department + lead of Societal Transition & Wellbeing lab @PIK Potsdam, former postdoc @ARE Berkeley, member @Junge Akademie & CESifo
Sophia Pompéry @sophiapompery.bsky.social 
Deutsche Bahn @deutschebahn.com Unsere Social-Media-Supportkanäle findet ihr unter bahn.de/socialmedia
Presse-Anfragen beantworten wir unter presse@deutschebahn.com
Impressum & Datenschutz: https://www.deutschebahn.com/rechtliches
Joanna Bryson @j2bryson.bsky.social Professor of Ethics & Technology @ Hertie School, Berlin. Interests: Artificial & Natural Intelligence; Behavioural Ecology; Cooperation; Digital Governance. Social media policy: https://joanna-bryson.blogspot.com/2024/10/guidance-to-my-social-media.html
Stefan Schulz @stefanschulz.com 📕Die Kinderwüste, 📘Die Altenrepublik,
📗Redaktionsschluss, 🎙️Die Neuen Zwanziger,
📺Fernsehpodcast
🔗 https://stefanschulz.com
Metagov @metagov.bsky.social Metagov is a laboratory for digital governance. We build tools, practices, and communities for self-governance in the digital age.
https://linktr.ee/metagov
Kara Swisher @karaswisher.bsky.social Amanda Katz said this was the cool kids table.
Sebastian Haas 🇪🇺 @seb.haas.partners data, policy | impact entrepreneur | covering soil and landscape‑scale agrobiodiversity
1st 🇪🇺 data altruism organisation for land use data registered
Prof Friederike Otto @frediotto.bsky.social 🇬🇧 🇪🇺 physicist, philosopher, lead https://www.worldweatherattribution.org/, author of Climate InJustice https://greystonebooks.com/collections/current-affairs-politics/products/climate-injustice, she/her
Albert Wenger @albertwenger.bsky.social VC at usv.com, blog at continuations.com, book at worldaftercapital.org
Costa Samaras @costasamaras.com Climate, energy, emerging tech, resilience, & policy professor. Carnegie Mellon Univ. Institute for Energy Innovation Director. Former Biden-Harris White House OSTP Chief Advisor for the Clean Energy Transition. Personal account. He/Him. costasamaras.com
Robinson Meyer @robinsonmeyer.bsky.social I’m the founding executive editor of Heatmap News, a contributing Opinion writer for The New York Times, and the cohost of the Shift Key podcast.
📍NYC
Amy Westervelt @amywestervelt.bsky.social Investigative climate reporter. Ida Tarbell stan. Run Drilled.media, contrib lots of places. Author "Brought To You By" @bloomsburybooksus.bsky.social. Pod: https://push.fm/fl/drilled. YT:@DrilledMedia. Signal: adubs.78.
Zeke Hausfather @zekehausfather.com "A tireless chronicler and commentator on all things climate" -NYTimes.
Climate research lead @stripe, writer @CarbonBrief, scientist @BerkeleyEarth, IPCC AR7 lead author.
Website: https://zekehausfather.com/
Substack: https://www.theclimatebrink.com/
Simon Evans @drsimevans.carbonbrief.org Press Gazette energy & environment journalist of the year 2022
Highly commended:
Society of Editors 2025
Shortlisted:
Press Awards 2025
Press Gazette 2025
AOP 2025
Deputy Ed + Snr Policy Ed, Carbon Brief
simon.evans@carbonbrief.org
Richard Waite @waiterich.bsky.social Director, Agriculture Initiatives, World Resources Institute. Working with colleagues around the world to create a sustainable food future. DC-based. Own views.
Madison Condon @madisoncondon.bsky.social climate risk, corporations, use & abuse of science & econ in the administrative state
papers: https://papers.ssrn.com/sol3/cf_dev/AbsByAuth.cfm?per_id=1654671
sometimes I am here and sometimes I am not
Josh Busby @busbyj2.bsky.social Professor at the University of Texas-Austin. Former Senior Climate Advisor DOD. Climate security, climate governance, clean energy, global health, US foreign policy. Author of States and Nature: The Effects of Climate Change on Security (Cambridge, 2022).
Michael Wara @michaelwara.bsky.social Works at Stanford on equitable climate and energy law/policy with a big helping of wildfire and insurance.
Dr. Dawn Wright @deepseadawn.bsky.social Seafloor mapper, Chief Scientist of smart mapping company Esri, Oregon State U. GIS/oceans professor, EC50, cyclist, 1st Black submersible diver to Challenger Deep, builds w/LEGO, raised in Hawaii. NAS, NAE, ORCID 0000-0002-2997-7611; She/her; views mine
Ken Caldeira @kencaldeira.com Mostly mentoring a group of postdocs.
Conceptual Investigations Unit, housed at Stanford.
Senior Scientist at Gates Ventures.
climate / energy / etc
https://ciunit.org
Posts imperfectly represent the views of my former self and not my employer.
Emily Grubert @gruberte.bsky.social civil engineer / environmental sociologist. energy, water, climate, buildings, justice. fossil phaseout / universal programs. she / her. bunnies.
Ramez Naam @ramez.bsky.social Author of the Nexus trilogy. Climate tech investor, author, and activist. Optimistic about the future. 
Arkady Martine | Dr. AnnaLinden Weller @byzantienne.bsky.social speculative fiction (Teixcalaan series, ROSE/HOUSE), climate & energy policy (all statements my own), Byzantinist (nonpracticing but never not true).
unfortunately, I care about power lines now
she/her. halfway between Santa Fe and NYC.
Danny Cullenward @ghgpolicy.org Forensic climate economist and lawyer • The carbon accounting canary in your climate policy coal mine • https://ghgpolicy.org
Chelsea Harvey @chelseaeharvey.bsky.social Climate & extreme weather reporter |
E&E News by POLITICO | NYC via NC SC AL WV
TIPS: charvey@eenews.net | chelseaeharvey@protonmail.com |
Signal @chelseaeharvey.01
ClimateFran @climatefran.bsky.social professor @UCDavis | climate change economist / scientist / general nerd | White House CEA 2022-23
https://franmoore.faculty.ucdavis.edu/- G g.na @gina.bzky.team Offline until locked accounts and/or “remove follower” are user options.
Rebecca Bratspies, Author @rbratspies.bsky.social Professor, Tulane Law | award-winning scholar, author, speaker
scuba diver | environmental justice, climate justice, human rights, NYC history, urban policy, comic books | mom | optimist (mostly) www.RebeccaBratspies.com
Jenny Chase @solarchase.bsky.social Solar analyst at BloombergNEF, goose keeper. Author of a book, "Solar Power Finance Without the Jargon". Opinions all my own.
Ayana Elizabeth Johnson @ayanaeliza.bsky.social Marine biologist, writer, policy nerd. Co-founder Urban Ocean Lab, think tank for the future of coastal cities. In love with climate solutions.
Paul Kelleher @paulkelleher.net Moral & political philosophy, climate econ, bioethics
Author of *The Social Cost of Carbon* (OUP 2025) | Posting in personal capacity
Likes: Boston Celtics ☘️, Maine (from whence I come), bouldering, ebikes, funding public ed.
paulkelleher.net
Hisham Zerriffi @hishamzerriffi.bsky.social Energy Resources, Development and Environment Lab (ERDELab) PI. Energy, equity, justice, climate change, bioenergy. But also TTRPGs and photography (https://pixelfed.social/i/web/profile/499807930552574625). he/him.
Marci Baranski @ecomarci.bsky.social 💡 Independent consultant.
📖 Author of The Globalization of Wheat: A Critical History of the Green Revolution
🌿 Ex-UNEP, ex-USDA
📌 DC
Joe DeCarolis @jfdecarolis.bsky.social Focused on applying state-of-the-art data systems, models, and analysis to inform decision making on energy. Professor at NC State University; served as the 10th Administrator of the U.S. Energy Information Administration. Personal account.
Blake Shaffer 🇨🇦 @blakeshaffer.bsky.social Associate professor of economics at the University of Calgary. Former energy trader.
blakeshaffer.ca
Jonathan Magnolia Gilligan @jmgilligan.org Integrating social & natural sciences & modeling to study climate change & society | Behavioral approaches to climate policy | Nashville TN | They/them 🏳️🌈 🏳️⚧️ genderqueer | Jew | Friends call me Maggie | My words aren't my employer's | magnoliagilligan.org
Patricia Levi @patricia-levi.bsky.social Strategy & Market Development @ Form Energy | Stanford PhD | MIT Energy Initiative | Macro-energy systems founder
Total nerd about: big batteries, grid decarbonization, electricity markets, bikes, mountains, plants, ceramics
Views mine
holly jean buck @hollyjeanbuck.bsky.social climate policy, writer, social scientist, geographer
Aimee Witteman @aimeewitteman.bsky.social Pro-housing decarb strategist. Midwest kid in D.C.⚡️
Also posts on democracy, bikes, trail running, and Lake Superior shipwrecks. Personal Account.
Silvio Marcacci @silviomarcacci.bsky.social Senior Director of Communications, @energyinnovation.org. Board Advisor, @theicct.org + @co2bc.bsky.social. Tired dad.
Rage, rage against the dying of the light.
Emil Dimanchev @emildimanchev.bsky.social Interdisciplinary scientist working on energy systems and climate policy. Postdoc at Princeton ZERO Lab. Research Affiliate at MIT CEEPR. Consulting for Good Judgment. 0th-gen immigrant. Writings: dimanchev.com.
Danielle Zoe Rivera @danielle-rivera.bsky.social 🇵🇷 Assistant Professor of Landscape Architecture + Environmental Planning at UC-Berkeley | Just + Equitable Environments | Disaster (and Disastrous) Research | Occasionally gardening + a dog
Justin Gundlach @justingundlach.bsky.social General Counsel & Director of Research at The Future of Heat Initiative. Previously a senior advisor at New York's Department of Public Service. NYC denizen.
That electrified lamp in the picture used to burn gas.
Alex Barron @alexrbarron.bsky.social Climate policy wonk. Rogue biogeochemist. Assoc. Prof., Fmr. Congressional staff (AAAS_STPF). Obama EPA & Biden OMB alum.
Josh Lappen @jlappen1.bsky.social energy historian | postdoc at Notre Dame, PhD at Oxford | infrastructure, decarbonization, and landscapes | Angeleno | always on the lookout for a good fun fact
views my own, at best
Bora Chang, MPH @climatechang.bsky.social communications/climate/environment; views my own
Kyri Baker @kyrib.bsky.social engineering professor @ University of Colorado
power systems optimization AND power lifting
"energy as a personality" -my wife
<3 cats, playing guitar/bass/drums, rock/metal, fitness, video games, taking stuff apart. Views =my own and not my employer's
Ed Carr @edwardrcarr.com US Center Director and Senior Scientist, Stockholm Environment Institute | Interim Chair, STAP/GEF | CLA IPBES Transformative Change Assessment | LA IPCC AR6 WGII | Masters T&F All-American | Hopelessly realistic optimist
www.edwardrcarr.com
Moira Birss @moira.bsky.social Climate, economic justice & human rights research, advocacy & policy visioning. Senior Fellow @cplusc.bsky.social studying US disaster insurance & global finance policy. Board co-Chair @lawgaction.bsky.social. Amo a 🇨🇴. Living on Ohlone land. she/ella/ela.
Destenie Nock, PhD @destenie.bsky.social Professor at Carnegie Mellon University. Energy Affordability. Energy & Climate Justice. Macro Energy Systems Modeling. CEO - Peoples Energy Analytics. Named a 2024 Science Defender. Nonfiction rep: @laurieabkemeier. Fiction rep: @ajvanbelle
David Hsu @dhsu.bsky.social Professor studying cities, infrastructure, climate, energy, long bike rides, the Boston Celtics, & the drop serve. Personal account representing only me. Likes, reposts ≠ endorsements.
Joshua Basseches @joshuabasseches.bsky.social Renewable energy and climate politics and policy. Assistant Professor at Case Western Reserve University. Author of Owning The Green Grid (MIT Press). More at joshuabasseches.com
Lauren McPhillips @lmcp.bsky.social Assistant Prof @ Penn State; into water, soils, infrastructure, nature-based solutions, sustainability, biking, looking at the bright side. mom of 2 energetic humans. Alum of Cornell/ USGS/ ASU. she/her. https://sites.psu.edu/lmcphillips/
Jaime Palter @jaimepalter.bsky.social Oceanographer, professor, Mom, Rhode Islander. Here to learn and connect with ocean, climate, energy crowd. 
Sara Meerow @sarameerow.bsky.social Associate Professor, University of Colorado Boulder
Working on urban resilience, climate change adaptation (especially heat and flooding), and green infrastructure
Sylvia Chi 齊思涵 @sylviachi.bsky.social lawyer but not your lawyer. admin law enthusiast. i work on environmental and climate justice, public banking, and public power. she/they 🇺🇸🇹🇼 Nutmegger in Oakland
opinions are my own!
Jeff Seidman (he/him) @jeffsseidman.bsky.social Teaches philosophy and environmental studies at Vassar College. Climate teaching website under development: https://climatesolutions-careers.org
Rebecca Dell @rebeccawdell.bsky.social Working to make stuff without baking the planet. Penchant for well-informed opinions. Industry Program Director, ClimateWorks Foundation. Views my own.
Monica Dean @monicadean.bsky.social I dabble in the climate policy-science-comms nexus
Current: Ocean & Climate Diplomacy @ Oceans 5
Former: @usc.edu | US Climate Envoy Team | UN Foundation/IPCC
Views my own.
Lyssa Freese @lfreese.bsky.social Climate, air quality, energy, equitable solutions
Otherwise in the mountains, throwing pots, or making dad jokes
Opinions my own, not my employer's.
Sarah Burch @sarahlynnburch.bsky.social Professor, Canada Research Chair - Sustainability transitions and climate change policy. University of Waterloo, 🇨🇦
Executive Director, Waterloo Climate Institute. IPCC LA 6AR, WGIII.
Sarah Perkins-Kirkpatrick @sarahinscience.bsky.social Professor, Climate Science | heatwaves | ANU Fenner School | Deputy Director Engagement & Impact, @21centuryweather | convening lead author @IPCC AR7 | co-host totally cooked podcast | @AMOS president | Climate Comms | Mother | Runner | #ADHD
Sarah Watson @sarahwatson.bsky.social lurking for climate resilience, adaptation, policy, and planning. Personal account.
Daniel Aldana Cohen @aldasky.bsky.social Political economy of climate emergency. Assistant Professor of Sociology, UC Berkeley; Director, Socio-Spatial Climate Collaborative, or (SC)2; Founding Co-Director, Climate and Community Institute @cplusc.bsky.social. A Planet to Win (Verso). he/him
Daniel Huppmann @danielhuppmann.bsky.social Climate & Energy at @iiasa.ac.at | chairperson @ccca.ac.at | co-chair #AAR2 | author of IPCC #SR15 | #ScientistsForFuture | #FreeTheModels & #FAIRdata for #OpenScience
https://iiasa.ac.at/staff/daniel-huppmann
Johanna Bozuwa @jbozuwa.bsky.social Researching climate + economic justice.
Direct Climate and Community Institute.
Chad Briggs @chadmbriggs.bsky.social Disaster risk & crisis management professor at AIM in Manila, hybrid warfare & disinfo researcher, purveyor of climate security and undesirable futures. RPG writer. Past lives in Alaska, Kosovo, Ukraine, Hungary, Ireland and elsewhere 🇨🇦
Jeva Lange 🫎 @jeva.bsky.social Writes about extreme weather & wildfires, nature & public lands, and adaptation & resilience for Heatmap.news | Hiking, running, mountains, boats, nonfiction books, long movies, sleep deprivation (baby) |📍 Seattle/Queens
Dr. Prakash Kashwan @pkashwan.bsky.social Env & Climate Justice Prof | Author Decolonizing Environmentalism https://tinyurl.com/3v2fysfr | Editor @environmentalpol.bsky.social | GoogleScholar https://tinyurl.com/PKGSChlr | Ex-Chair @isaess.bsky.social | Dad, Husband
David Sacerdote @davidsacerdote.bsky.social Software engineer.
Mostly talk climate and related politics.
Meade Krosby @meadekrosby.bsky.social Climate adaptation for nature and people @ Climate Impacts Group, University of Washington. Surfer/paddler. Settler on Coast Salish land. She/her.
Personal account - views mine.
Tessa Hill @tessahill.bsky.social Climate change, oceans, blue carbon and coastal communities. Professor, researcher, educator, author. 🌊
📕: At Every Depth @ateverydepth.bsky.social
AtEveryDepth.com
bio.site/Tessahill
John Paul Helveston @jhelvy.bsky.social Systems Eng Prof @ GWU 🦛 | Director, Data Analytics MS Program | EVs 🔋🚗 | Low Carbon Tech | Choice Modeling | Survey Research | China | US-China Policy | #rstats | #reproducibility | #opensource | Father | opinions own 
Marta Berbés @mberbes.bsky.social Prof at University of Waterloo
Resilience, transformation, justice, futures, not necessarily in that order.
Co Editor-in-chief Ecosystems and People @esandpeople.bsky.social
Anne Jefferson @annejefferson.bsky.social Watershed hydrology and geomorphology prof and Lake Champlain Sea Grant Director here for science, the environment, and life as an academic & mom. Formerly @highlyanne.
Posts are personal and do not represent organizations. Reposts are not endorsements.
Mary Anne Hitt @maryannehitt.bsky.social Climate strategist. Formerly Beyond Coal, Sierra Club, Appalachian Voices. Co-host of No Place Like Home podcast. Contributor to anthologies All We Can Save, Not Too Late, Patagonia's Tools for Grassroots Activists. Musician. Mountain mama. Go Vols.
Ann Marie Carlton @amgcarlton.bsky.social Professor & Vice Chair, UC Irvine Chemistry | Atmospheric Chemist | OSTP46 | Fellow of the AGU & AAAS | Part-time bike mechanic
Chris Nelder @chrisnelder.bsky.social Creator and Host of:
Transition Times and Nelder Notes: @TransitionTimes.bsky.social
Energy Transition Show: @TransitionShow.bsky.social
Energy writer/podcaster/analyst/speaker
Home: www.ChrisNelder.com