Shannon Osaka @shannonosaka.bsky.social climate *zeitgeist* reporter for @washingtonpost.com. Reach me on Signal: smosaka.27
Dan Kammen @dankammen.bsky.social Husband & father of two amazing daughters, former Obama and Biden Administration(s) energy, climate and justice team member. Decarbonization and climate justice. Pilot. Astrophotographer. Very concerned US resident. Professor: http://rael.berkeley.edu
Penn Center for Science, Sustainability & the Media @penncssm.bsky.social Penn Center for Science, Sustainability, and the Media focuses on challenges and opportunities in communicating climate and environmental sustainability. Email us to connect: upenncssm@sas.upenn.edu.
https://web.sas.upenn.edu/pcssm/
Hélène Angot @heleneangot.bsky.social CNRS Research Scientist, IGE Grenoble 🇫🇷 🏔️
Polar science, biogeochemical cycles, Hg
Andreas Sieber @andreassieber.bsky.social Energy & Climate Geopolitics
Head of Political Strategy @350.org
Energy Co-Lead, International Climate Policy Hub.
Views = my own
Isaac Symes Thompson @isaacsst.bsky.social Research Assistant in the AI for Cyber Defence research centre at The Alan Turing Institute.
Andrea Ketchum @envirolib.bsky.social Medical research librarian following Environmental Health issues for Michigan & Great Lakes region. For 2025, I'm definitely straying into other issues, due to the direction of our current federal government.
Christopher Callahan @ccallahan45.bsky.social climate scientist: extreme heat, health, attribution, climate in the courts. heat wave is two words. iuclimateandsociety.com
Mustafa Zahid @mustafahzahid.bsky.social PhD student @ERGBerkeley | formerly @stanfordECHOLab | BA '17 @ISatUSFCA | MS '19 @USF_Economics | @researchincolor mentee '21 | personal website: http://mustafahzahid.netlify.app
AGU GeoHealth Section @agugeohealth.bsky.social The GeoHealth section of AGU 
Marie Spiker @mariespiker.bsky.social Assistant Professor, University of Washington School of Public Health | food systems, nutrition, public health, qualitative research, systems science, sustainability & resilience | views my own
Yushi Tang @yushifelixtang.bsky.social Statistical genomics | Causal inference | Human genetics | Molecular ecology | PhD candidate in Storey Lab @ Princeton University
Jenny Fisher @atmosjennyf.bsky.social Atmospheric Chemistry | Tertiary Education | Science Policy | Diversity, Equity & Inclusion | Triathlon | Scuba Diving | 🇦🇺 on the lands of the Bindal & Wulgurukaba peoples. she/her. views my own.
Ana Prados @aprados1.bsky.social Scientist @UMBC working at the intersection of #disasters #risk #wildfires #airquality and #remotesensing
Steve Smith @stevenjsmith.bsky.social Earth-Human Systems Scientist at the Joint Global Change Research Institute (PNNL) and the Center for Global Sustainability (UMD). Canoeist. Singer. Comments are my own. He/him/his.
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.
Zhonghua Zheng @zhonghuazheng.bsky.social Associate Professor in Data Science & Environmental Analytics @The University of Manchester | Editor, Atmospheric Chemistry and Physics (ACP) | zhonghuazheng.com
Urban Climate & Air Quality/Aerosol Modelling
NCAR ASP Fellow, Columbia PDRA, UIUC MCS+PhD
Emily Gordon @emilygordynz.bsky.social Lecturer @ University of Auckland | Climate variability + data science | emilymgordon.com
Katharine Hayhoe @katharinehayhoe.com climate scientist
posts 100% my own
🇨🇦 is my home
distinguished professor & chair, Texas Tech
chief scientist, The Nature Conservancy
board member, Smithsonian NMNH
advisor, Lawson Climate Inst UofT
alumna, UToronto and UIUC
author, Saving Us
Brendan Nyhan @brendannyhan.bsky.social Dartmouth political scientist and Bright Line Watch co-director. Previously Upshot NYT / CJR contributor, Spinsanity co-founder, All the President's Spin co-author.
https://sites.dartmouth.edu/nyhan/
http://brightlinewatch.org
Prof. Stefan Rahmstorf @rahmstorf.bsky.social Climate scientist, professor of Physics of the Oceans in Potsdam. Dad. Opinions my own.
Born at 317 ppm CO2.
Ketan Joshi @ketanjoshi.co Hey, I'm a climate and energy writer / data analyst who focuses on corporate + govt accountability
Creator + curator of the Greensky feed: https://ketanjoshi.co/greensky/
Based in Oslo but write about US, Europe, Aus too - ketan.joshi85@gmail.com
The Onion @theonion.com America’s Finest News Source. A @globaltetrahedron.bsky.social subsidiary.
Get the paper delivered to your door: membership.theonion.com
Join The Onion Newsletter: https://theonion.com/newsletters/
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
Eric Roston @eroston.bsky.social Butterflies and zebras and moonbeams and fairy tales. Literally wrote the book on carbon. Born 326.17. He/him. "Bleakly amusing." —A. Martine.
"The dad jokes will continue until morale improves." —Charlie Jane Anders.
Signal: eroston.87
Bloomberg Green
Dave Levitan @davelevitan.bsky.social Science journalist, bylines all over the place.
Book: NOT A SCIENTIST: How politicians mistake, misrepresent, and utterly mangle science (WW Norton).
www.davelevitan.com
Sign up: www.gravityisgone.com
Zack Labe @zacklabe.com Climate Scientist at @climatecentral.org | PhD | Passionate about improving science communication through data-driven stories | Harrisburg, PA | https://zacklabe.com/
Views, thoughts, and opinions expressed here are only my own.
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
Jacquelyn Gill @jacquelyngill.bsky.social Climate, extinction, and biodiversity scientist at the University of Maine researching Earth’s past for a better future. Writing and podcasting for the planet. Chaotic good professor. She/her.
Gavin Schmidt @climateofgavin.bsky.social Climate scientist, juggler. Bikes etc. Blogging at https://www.realclimate.org - data visualization, explainers, and debunking.
David Ho @davidho.bsky.social Climate scientist; ocean carbon cycle and climate solutions. Professor @soest.hawaii.edu, University of Hawaiʻi at Mānoa; Visiting Faculty, Arizona State University. https://linktr.ee/david_ho
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
Naomi Oreskes @naomioreskes.bsky.social Historian, Earth Scientist, Writer, Public Intellectual.
Books: Merchants of Doubt; Collapse of Western Civilization; Science on a Mission; Discerning Experts; Why Trust Science?; The Big Myth. Loves: Chocolate, Red Wine, Skiing, family. Hates: Beets.
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.
Brian McNoldy @bmcnoldy.bsky.social Univ. of Miami hurricane researcher 🌀 living in New Mexico 🏜.
Husband and dog dad. 🏳️🌈
https://bmcnoldy.earth.miami.edu/
Peter Gleick @petergleick.bsky.social Climate, water, birds, bluegrass mandolin. Member US National Academy of Sciences, MacArthur Fellow, Carl Sagan Prize, author of The Three Ages of Water (2023) and When the Well Runs Dry (2026). Email me at pgleick (at) gmail.
Reto Knutti @retoknutti.bsky.social Professor for climate physics at @ethzurich.bsky.social.
John Schwartz @jswatz.bsky.social UT Austin journalism professor; former NYT, WP. he/him. Galveston BOI. Born at 314.8 ppm CO2.
Eric Berger @sciguyspace.bsky.social Senior Space Editor, Ars Technica. Likes rockets. 
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
Dr. Genevieve Guenther (she/they) @doctorvive.bsky.social
Founding Director, End Climate Silence
Author, *The Language of Climate Politics: Fossil-Fuel Propaganda and How to Fight It*
genevieveguenther.com
Capital Weather @capitalweather.com D.C.'s Trusted Weather Team
http://www.capitalweather.com | info@capitalweather.com
Marshall Shepherd @drshepherd2013.bsky.social Weather-Climate professor and scientist, Host of Weather Geeks, Forbes Senior Contributor, Alpha, 3xFSU Alum...Tweets and RTs are mine but not endorsements
Matt Lanza @mattlanza.bsky.social I am the trick my mother played on the world.
Xennial Meteorologist in Connecticut. Heart always in Houston. Forecasts: theeyewall.com & spacecityweather.com.
I like books, history, sports cards, baseball, Rutgers, #BHAFC.
Opinions my own.
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.
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
Prof. Sonia I Seneviratne @soniaseneviratne.bsky.social Professor at ETH Zurich, IPCC WGI Vice-chair.
#Climate #Extremes #Land.
Citizen/mum/scientist. Personal account.
https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Chapter11.pdf
Twitter/X: @SISeneviratne
https://www.iac.ethz.ch/people/sonia
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
Dave Vetter @davidrvetter.bsky.social Climate and sustainability writing and communications; duck monitor.
Geoffrey Supran @geoffreysupran.bsky.social Professor of Environmental Science & Policy and Director of Climate Accountability Lab at University of Miami's Rosenstiel School of Marine, Atmospheric, and Earth Science.
Investigating Big Oil's climate propaganda. Formerly Harvard, MIT, Cambridge.
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
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
Dr. Jeff Masters @drjeffmasters.bsky.social Extreme weather and climate change expert writing for Yale Climate Connections. Co-founder, Weather Underground; former hurricane hunter.
Ruth Mottram @ruthmottram.eurosky.social Climate scientist at DMI, Greenland, Antarctica, polar regions in general.
Now migrated to eurosky.social on here.
Mostly on mastodon though @ruth_mottram@fediscience.org
Blogging at sternaparadisaea.net
Elizabeth Kolbert @elizkolbert.bsky.social I am a New Yorker staff writer and author of "H is for Hope," "Under a White Sky," and "The Sixth Extinction," and “Life on a Little-Known Planet." Learn more at elizabethkolbert.com.
Climatologist49 @climatologist49.bsky.social PhD Climate Scientist. Alaska. The Earth is warming because of us. Mooseologist. All opinions are my own. Future FIFA Peace Prize winner. TDS. Signal: Climatologist.49
Tim Latimer @timlatimer.bsky.social Geothermal 🌋⚡️
CEO @ Fervo Energy
HTX
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.
Dr Adam Levy @climateadam.bsky.social Climate scientist, journalist, YouTuber, Adam 🏳️🌈
https://www.youtube.com/ClimateAdam/
https://www.climateadam.com
Ed Yong is offline @edyong209.bsky.social Writer, journalist. Science, health. Pandemics, animals. Birder, photographer. Many words, some awards. AN IMMENSE WORLD, I CONTAIN MULTITUDES. Married to Liz Neeley, parent to Typo. he/him
📷 Canon R6mkii + RF 800mm
Edyong.me
The Atlantic @theatlantic.com Exploring the American idea through ambitious, essential reporting and storytelling. Of no party or clique since 1857. http://theatlantic.com
Andrew Dessler @andrewdessler.com Prof of Atmospheric Sciences & climate scientist @ Texas A&M; AGU and AAAS Fellow; Native Texan; find out what I think at https://www.theclimatebrink.com/
Nick Hagerty @hagertynw.bsky.social Environmental & resource economist, assistant professor at Montana State. Water, ag, land use, climate, development, research methods
Emily Grubert @gruberte.bsky.social civil engineer / environmental sociologist. energy, water, climate, buildings, justice. fossil phaseout / universal programs. she / her. bunnies.
Bob Kopp @bobkopp.net #Climate & sea level science + policy. Rutgers University. All views my own. www.bobkopp.net
Katharine Mach @katharinemach.bsky.social Environmental Science and Policy Professor at University of Miami Rosenstiel School and Abess Center.
Climate-related risks and response options to address them. Views my own.
climateprep.rsmas.miami.edu/index.html
Tatyana Deryugina @tderyugina.bsky.social Ukrainian. American. Associate Professor at UofI. Co-editor at AER:I and EEPE. Co-founder of http://econ4ua.org. deryugina.com https://ukraineinsights.substack.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
Leah Stokes @leahstokes.bsky.social Professor of climate + energy policy at UCSB. Alumni of MIT, Columbia and UToronto. Hosts "A Matter of Degrees" podcast. Cuts carbon pollution! Proudly 🇨🇦 Gardener 🌱 leahstokes.com; Newsletter: electricnotes.news
Michael Wara @michaelwara.bsky.social Works at Stanford on equitable climate and energy law/policy with a big helping of wildfire and insurance.
Jonathan Colmer @jmcolmer.bsky.social Associate Professor at UVA Econ | Co-Founder & Director of the Environmental Inequality Lab | Environmental Econ, Growth & Dev, Labor, Public | PhD from LSE | 🇬🇧 in 🇺🇸 | www.jonathancolmer.com 
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/
John Voorheis @johnvoorheis.bsky.social Bad takes are my fault
Teevrat Garg @teevrat.bsky.social Environmental and Development Economist at UCSD. Board of AERE, Editor at JAERE. 
David Roberts @volts.wtf I run a newsletter/podcast called Volts about clean energy & politics. Subscribe & join the community at http://volts.wtf!
Daniel Swain @weatherwest.bsky.social Weather and climate scientist focused on extreme events like floods, droughts, & wildfires on a warming planet. www.weatherwest.com
Seema Jayachandran @seema.bsky.social Economics professor at Princeton. I study environmental conservation, gender equality, and (too many) other topics in developing countries.
seemajayachandran.com
Marshall Burke @marshallburke.bsky.social unsolicited commentary on economics and the environment. Stanford prof, +co-founder AtlasAI
Makoto Kelp @soa-mazing.bsky.social Asst Prof. UUtah | Postdoc Stanford | Harvard PhD ‘23 | Air Quality + Fires + Climate 🌎 | Machine Learning + Data Science 🖥️
Jesse D. Jenkins @jessedjenkins.com Macro-energy systems engineering, optimization & policy. Associate professor at Princeton University. Leads the ZERO Lab. Co-hosts SHIFT KEY podcast. Time100 Next & TIME100 Climate honoree. More at linkedin.com/in/jessedjenkins & zero.lab.princeton.edu