Madalsa @madalsa.org Assistant Professor, Rochester Institute of Technology. I study and teach carbon-constrained energy systems. via Stanford, IIT Bombay. Views mine, many interests.
https://long-arc.org/
https://madalsa.org/
California Environmental Justice Alliance (CEJA) @ceja.org Coalition of 10 grassroots orgs fighting for environmental justice in CA. We defend low-income communities of color on the frontlines of pollution to build healthy communities for all. Affiliate organization to @ceja-action.org
Ben Purvis @benpurvis42.bsky.social Undisciplined scholar. Researching in and around the politics and philosophy of sustainability assessment. Some sort of Eco-Marxist. Perpetual Research Associate. Branch Secretary @SheffieldUCU.bsky.social
(they/he) 🏳️⚧️🍉
350.org @350.org Building a global, people-powered movement to end the fossil fuel era and create a world grounded in climate justice and powered by safe, fair renewable energy for all.
@sandranakagawa.bsky.social @sandranakagawa.bsky.social 
Cody Hill @cody-hill.bsky.social I used to spend too much time on Energy Twitter. Interested in everything.
Inside Climate News @insideclimatenews.org Pulitzer Prize-winning, nonprofit, non-partisan newsroom dedicated to covering climate, energy and the environment. Our newsletters: http://bit.ly/3mcVORO
rahaeli @rahaeli.bsky.social Cofounder @dreamwidth.org / disabled queer cat lady / running social media since before it was "social media" and Trust & Safety since the dawn of time / do not cite the deep magic to me, I wrote it / no, I'm allergic to that, too
Cari Barcas @caribarcas.bsky.social Communications director at @Stand.earth. Environmental advocate. Climate communicator. Recovering journalist. Practicing hope as a discipline. Born in CIN, raised in CHI, home in AVL.
Dr. Jonathan Foley @globalecoguy.bsky.social - Executive Director, Project Drawdown drawdown.org
- Climate scientist, working on solutions
- Passionate about science, communication, and hope
- Minnesota based, Maine born
- Personal account / My views
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.
Rebecca Solnit @rebeccasolnit.bsky.social Writer of books. Guardian columnist. Newsletter at MeditationsInAnEmergency.com. Board member, Third Act and Oil Change International.
Auke Hoekstra @aukehoekstra.bsky.social Sharing hope and debunking FUD against electric vehicles and renewable energy. Director NEONresearch.nl @TUeindhoven Founder Zenmo.com.
Kate Marvel @drkatemarvel.bsky.social Climate scientist, formerly NASA, currently Project Drawdown. Former astrophysicist, current Earth supremacist. Author of HUMAN NATURE, best book of 2025 according to both Scientific American and my dad https://shorturl.at/aJRYb
Michael E. Mann @michaelemann.bsky.social Scientist/Author/Speaker; Presidential Distinguished Prof/Director Center for Science, Sustainability & the Media, U. Penn; National Academy of Sciences; American Academy of Arts & Sciences; Royal Society; Tyler Prize
Ed Hawkins @edhawkins.org Climate scientist at the National Centre for Atmospheric Science, University of Reading | IPCC AR6 Lead Author | MBE | Views own | https://edhawkins.org
Warming Stripes: http://www.ShowYourStripes.info
Jason John @jswjohn.bsky.social Deputy Director @CCST.us | Conservation scientist & @ucsantacruz.bsky.social alum | Views are my own | (he/him)
Climate Outreach @climateoutreach.bsky.social Every year we work with hundreds of partners - from charities to governments to business - to help them navigate difficult climate communications and unlock more ambitious climate action.
https://climateoutreach.org/
National Center for Science Education @ncse.bsky.social Fighting disinformation in the science classroom. ncse.ngo
Eric Hittinger @elephanteating.bsky.social Inaugural Director of RIT's School of Public Affairs, WILL International Chair at Univ. of Lille, & Past President of the US Association for Energy Economics. Batteries, renewables, electricity markets, and emissions. Sometimes I bike across the continent.
sonia aggarwal @soniaaggarwal.bsky.social @energyinnovation.bsky.social
Energy Innovation @energyinnovation.org Energy Innovation is an energy and climate policy firm working to accelerate decarbonization through unbiased, non-partisan research and analysis 🔌💡
https://energyinnovation.org/
Carla Marinucci @cmarinucci.bsky.social POLITICO CA Playbook founder and alum, ex-SFChronicle senior political writer, ex-SF Examiner Political Editor. California politics and all things Golden State. Bay Area based. Also on X at @cmarinucci. Email: cmarinucci@gmail.com
Mikel Shybut, PhD @shybut.bsky.social Director of Strategic Initiatives at @ccst.us
Julianne McCall @juliannemccall.bsky.social CEO of the California Council on Science & Technology, a nonpartisan nonprofit established by the State of California in 1988 to serve as and channel science and technology advisers to policymakers. www.ccst.us
Tom Phuong Le @tomphuongle.bsky.social Associate Professor of Politics at Pomona College. Author of Japan's Aging Peace: Pacifism and Militarism in the Twenty-First Century (Columbia University Press). http://cup.columbia.edu/book/japans-aging-peace/9780231199797
Elizabeth Warren @warren.senate.gov U.S. Senator, Massachusetts. She/her/hers. Official Senate account.
https://substack.com/@senatorwarren
Matt Vespa @missionvespa.bsky.social Clean energy attorney at https://earthjustice.org/ working to dismantle fossil fuel industry with focus on building electrification and utility accountability in CA. Adjunct Professor of Renewable Energy Law & Policy at Berkeley Law. 🏳️🌈 ⚡️🏠
Ethan Elkind @ethanelkind.bsky.social Director of the Climate Program at Berkeley Law CLEE, author of Railtown (book on history of LA Metro Rail), and host of KALW’s State of the Bay.
InfluenceMap @influencemap.bsky.social InfluenceMap empowers investors, media, and NGOs with data-driven and clearly communicated analysis on critical issues related to the climate crisis. Find us at - influencemap.org
Jason Sisney 🏳️🌈 @jasonsisney.bsky.social #CABudget advisor. Views=my own. | #CALeg | Olympic history and finance | he/him/his
James Glynn @drglynn.bsky.social Founder CEO, Adjunct Professor of Energy Engineering
Purpose driven, building open source energy systems frameworks for strategic decision optimisation.
Leveraging 50 years of institutional knowledge in the #IEA #ETSAP #TIMES code.
Jim Duffy @co2battle.bsky.social Retired engineer and environmental scientist, low carbon fuels expert, professor, nuclear power instructor, and submarine driver. Believer in honorable service and the power of good government. Avid golfer, armchair quarterback, and animal lover.
Sam Mahanes @samuelmahanes.bsky.social CA Leg. CCST Science Fellow '23, UC Irvine '22, UMiami '15.
Colin Cunliff @colin-cunliff.bsky.social Clean energy innovation enthusiast. Passionate about addressing climate change. Trapeze novice. Personal account.
Ryan Williams @rwilliamsca.bsky.social CA Politico based in Petaluma.
Maria Gallucci @mariagallucci.bsky.social Senior Reporter for Canary Media, covering the clean energy transition ⚡️
Josh Kehoe MD @argonbeam.bsky.social General and colorectal surgeon. Biofuel enthusiast. Maritime shipping investor. 
Stephen Johnson @sfjsynfuels.bsky.social I develop plants that convert municipal garbage into jet fuel and alternative fuel for cement plants.
CEO/Founder, Illinois Clean Fuels- D co2.trader @dunnde.bsky.social Carbon Markets Trader
Cantankerous Old Bastard
#COYB
#Believeland
Carbon Acumen @carbonacumen.bsky.social Market intelligence into Renewable & Clean Fuel Standards
Read: carbon-acumen.com
Jonathan Koomey @jgkoomey.bsky.social Climate solutions, information technology, critical thinking skills. Born at 318 ppm. https://www.koomey.com
Sara S. Moore @stripeygirlcat.bsky.social (she/her) Climate change adaptation researcher + Resilience Analyst at the CPUC, Sacramento. Opinions are my own. 🏳️🌈
http://pacificadaptation.blogspot.com
Climate Cares Centre @climatecares.bsky.social To understand & support mental health in the climate crisis. A Centre within Imperial College London's Institute of Global Health Innovation, and partnering with Grantham Institute & Helix Centre.
🌎 #ConnectingClimateMinds
imperial.ac.uk/climate-cares
Yale Program on Climate Change Communication @yaleclimatecomm.bsky.social We conduct research on public climate change knowledge, attitudes, policy support & behavior. Posted events are not endorsements.
https://climatecommunication.yale.edu/
Joeri Rogelj @joerirogelj.bsky.social prof. climate science & policy | Imperial College London | 1.5C/net zero/carbon budget/pathways/justice | IPCC & UNEP lead author | ESABCC member | father
Project Drawdown @projectdrawdown.bsky.social 🌍 The world’s leading guide to science-based climate solutions.
Visit www.drawdown.org to learn more
Paulina Jaramillo @paulijllo.bsky.social Professor of Engineering & Public Policy @CarnegieMellon. Energy system transtions and climate. #energysky #climatesky. IPCC AR6 WGIII. Now a @AAAS S&T Policy Fellow in the House of Reps. 🇨🇴by birth, 🇺🇸 by naturalization. 🐘lover. Views are my own.
Cara Horowitz @carahorowitz.bsky.social Environmental lawyer, mom, California enthusiast with NY roots. Exec Dir of the Emmett Institute on Climate Change and the Environment at UCLA Law School.
Dan Sanchez @danlsanchez.bsky.social Prof at UC Berkeley. Biomass, carbon removal, and wood products. PhD from Berkeley. Carbon-centric.
Humberto Basilio @humbertobasilio.bsky.social Science Journalist | words in The New York Times, Nature, National Geographic, Science Magazine, Scientific American, Atmos, etc | Views my own |
Tips: hmbrtbasilio@gmail.com
Signal: humbertobasilio.24
Yale Climate Connections @climateconnections.bsky.social We're a news service that helps you understand climate change and what you can do about it. Get climate solutions in your inbox: https://yaleclimateconnections.org/newsletters/
Grantham Institute - Climate Change and the Environment @granthamicl.bsky.social Our mission is to lead on world-class research, policy, training and innovation that supports effective action on climate change.
Chris Francis, Ph.D. (he/him) @drchrisfrancis.bsky.social 🇯🇲 + 🇬🇾
🎓: MIT '12 | UC Berkeley M.S. '14 | UC Berkeley PhD '17
Fmr. Budget Advisor for CA State Senate ('18-'24) #CABudget
California Council on Science and Technology (CCST) @ccst.us Making California's policies stronger with science and technology. Training CCST Science & Technology Policy Fellows. Nonpartisan, nonprofit. Established via California State Legislature. #AI #Energy #Wildfire
Ryan Schuchard @ryanwithboulder.bsky.social Climate leader. Dad of 2 mighty girls. Fixer. Boulder City Councilmember running for re-election on November 3, 2026.
Help me by donating up to $100: https://www.ryanwithboulder.com/donate
🌎🚲🚌🏘️⚡️💥💥
Biofuelwatch @biofuelwatch.bsky.social We work to protect climate, forests, biodiversity and communities from destructive impacts of large-scale bioenergy, Website: www.biofuelwatch.org.uk Email: biofuelwatch[at]gmail[dot]com
Arvind Ravikumar @arvindpawan1.bsky.social Assistant Professor, University of Texas at Austin
Co-Director, Center for Energy and Environmental Systems Analysis (CEESA) studying greenhouse gas emissions measurements and carbon accounting across global energy supply chains.
Jeff St John @jeffstjohn.bsky.social Chief reporter at Canary Media, energy transition believer, holder of faith in truth, justice, and the inherent goodness of my fellow human beings. Parent of Lily the Corgi.
@hsafford.bsky.social @hsafford.bsky.social 
Bill McKibben @billmckibben.bsky.social Founder 350.org and Third Act, author The Crucial Years on substack https://billmckibben.substack.com/
Author of 21 books, beginning with The End of Nature
Michael Liebreich @mliebreich.bsky.social Host @CleaningUpPod. CEO Liebreich Associates. Managing Partner Ecopragma Capital. Founder, Contributor @BloombergNEF. Ex Board TfL, Board of Trade. Olympian. Don't message me - I'm not prepared to give away personal data to prove my age. Srsly BlueSky!
Alexandria Ocasio-Cortez @aoc.bsky.social Waitress turned Congresswoman for the Bronx and Queens. Grassroots elected, small-dollar supported. A better world is possible.
ocasiocortez.com
Nik Pavlenko @npavlenko.bsky.social Director of Aviation and Fuels Programs at the International Council on Clean Transportation. Interested in climate change, transportation, cooking and Philly sports. Views=my own.
Kyle Meng @kylemeng.com Professor at UCSB Bren School and Econ Dept. Climate and Energy Director at emLab. Former White House CEA Senior Climate Economist. Associate at @nber.org @csis.org. Board member @ucsusa.bsky.social. Personal views. www.kylemeng.com
Union of Concerned Scientists @ucs.org The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems.
ucs.org
Hank Green @hankgreen.bsky.social Long Time Internet Guy
Amy Lee @amyelee.com Postdoc at the University of California, Davis. Studying policy and politics of transportation, land use, and travel behavior. She/her. amyelee.com 🏳️🌈
Kendra "Gloom is My Beat" Pierre-Louis @kendrawrites.com Climate journalist based in NYC. Only speaking for myself. If the NYT has no haters I'm dead.
Tips? Reach me on Signal kendrawrites.04
Sara Constantino @smconstantino.bsky.social Assistant Professor at Stanford’s Doerr School of Sustainability, Visiting Scholar Princeton SPIA. Sustainable dev’t, climate, energy, collective action, crises, behavior, decision making. 🇵🇹🇧🇷🇨🇦
Lara Williams @lararhiannon.bsky.social I write about climate change for @opinion.bsky.social and pursue the outdoors
Severin Borenstein @severinborenstein.bsky.social Economics, Business, and Energy Prof at UC Berkeley. Member, Board of Governors, CA ISO. All opinions only my own.
Aarón Cantú @aaroncantu.bsky.social California climate accountability reporter @capitalandmain.bsky.social
Subscribe for updates: https://aaroncantu.ghost.io/
Signal: amc.213
Opinions mine
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
Andrea Thompson @andreatweather.bsky.social Senior Desk Editor for Life Sciences at Scientific American, covering earth and the environment. (she/her) Posts are entirely my own and not reflective of my employer. Email: andrea.thompson@sciam.com Signal: @AndreaT.95
Ethan Freedman @ethanpfreedman.com Just be cool, man.
Reporter: science, nature, agriculture, climate. Bylines at Scientific American, PopSci, Sierra, Slate, Fatherly, etc.
He/Him. RTs =/= Endorsement. Opinions solely mine. Old posts delete en masse.
Chicago
www.ethanpfreedman.com
Brad Plumer @bradplumer.bsky.social Reporter, NYT Climate.
email: brad.plumer@nytimes.com
signal: bradplumer.54
Julia Simon @juliaradio.bsky.social NPR's Energy and Climate Solutions Correspondent
SF by way of Nigeria, Indonesia, and Egypt • 🇳🇬🇮🇩🇪🇬
For tips my Signal juliaradio.33
Seth Borenstein @borenbears.bsky.social Climate and science writer at The Associated Press, covers disasters, all sorts of science. Teaches journalism at NYU/DC. Father of 3, husband of 1. Red Sox fan.
Chelsea Harvey @chelseaeharvey.bsky.social Climate & extreme weather reporter | POLITICO | PEN Guild | Former (and forever) E&E News | NYC via NC SC AL WV
TIPS: charvey@politico.com | chelseaeharvey@protonmail.com |
Signal @chelseaeharvey.01
Leo Hickman @leohickman.carbonbrief.org Editor and director, Carbon Brief
https://bsky.app/profile/carbonbrief.org
Kat Kerlin @katkerlin.bsky.social Environmental science writer, press officer, pro #scicomm -er for UC Davis. Covering climate change, ecology, conservation, water and wildlife. My other brain is full of paint. Views my own.
Lisa Song @lisalsong.bsky.social Climate/environment reporter at ProPublica. Cartoon me by Laila Milevski. Pro-cats, anti-carrots. Contact: lisasong.42 on Signal
Damian Carrington @dpcarrington.bsky.social Environment editor at The Guardian
Send info confidentially via Signal: dpcarrington.35
Or via this link👇
https://www.theguardian.com/tips
Casey Crownhart @caseycrownhart.bsky.social Climate tech reporter at MIT Technology Review ~ big fan of batteries and also the New York Mets.
Want me in your inbox? Sign up for The Spark: technologyreview.com/spark
Andrew Freedman @afreedma.bsky.social Senior Reporter, Weather & Climate @cnn. Priors: Axios, WaPo | Alum: The Fletcher School, Columbia Climate & Society | Tips: andrew.freedman@cnn.com | afreedman@protonmail.com | Signal: @afreedmanclimate.03
Laura Millan @lauramillan.bsky.social Writing about 🔥💧and all things climate at Bloomberg
Alexandra Witze @alexwitze.bsky.social Science journalist and correspondent for Nature (she/her). Opinions = my own. Reach me at alexwitze.01 (Signal), witzescience (@gmail.com), or awitze (@protonmail.com).
Carbon Brief @carbonbrief.org Award-winning journalism focused on #climatechange, science, energy and policy. Subscribe to our free newsletters: http://bit.ly/CBnewsletters or visit our website: https://www.carbonbrief.org/
Follow our journalists: https://go.bsky.app/6X95R1T
Zahra Hirji @zhirji.bsky.social Bloomberg News climate reporter. Past BuzzFeed News, InsideClimate News. Mom. She/her. Views are my own.
Email: zhirji@bloomberg.net
Signal: zhirji.51
Todd Woody @toddwoody.bsky.social Environmental journalist covering climate and ocean issues at Bloomberg News in San Francisco. Formerly at Participant Media, Fortune, Forbes, San Jose Mercury News, Sacramento Bee and other publications. www.toddwoody.com twoody4@bloomberg.net
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
Sarah Laskow @slaskow.bsky.social senior editor at the Atlantic. I think a lot about climate, disease, animals, plants, risk, kids, New York City, and sometimes other cities too
Lora Kolodny @lorak.bsky.social reporter at cnbc.com. email: lora.kolodny@cnbc.com - ex-wsj, techcrunch & all over. i cover: elon musk cos. mostly tesla & spacex (some climate tech). my posts here are my own. optimistic on the inside. dm me on signal: lorakolodny.55
Corinne Scown @cdscown.bsky.social Senior scientist working on bioenergy 🌱 & circular plastics ♻️ LCA/TEA | Mom of 2, Opinions=own (she/her)
Kate Gordon @katenrg.bsky.social CEO at CA FWD; Non-resident Scholar Carnegie Inst. Energy, climate, & economic development nerd (plus lover of Oxford commas); speaker/thinker/writer when I have time; proud public school parent. Former DOE & Office of CA Governor.
Ashanti Washington ⚡️ @byashanti.bsky.social Communicator • Strategist • Consultant
Energy, power, people & policy
Tennessean. Grid geek. Fourth estate fan!
Priors: FERC, CELI, UCS, ORNL
The Institute for Transportation Decarbonization (ITD) @decarb-transpo.bsky.social ITD is focused on accelerating clean solutions to move people and goods by identifying policy actions to reduce emissions from transportation.
Check us out at decarbonizetransportation.org!