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
Calgary Climate Hub @calgaryclimatehub.ca A diverse group of Calgarians coordinating & mobilizing local climate change action. #yyc #yyccc #ClimateChange #ClimateAction #ClimateSky
Climate and Transit @climateandtransit.bsky.social A focus on city planning,transit planning and sustainability!
“Train good and car bad!”
Seth Klein @sethdklein.bsky.social Past Team Lead, Climate Emergency Unit; author of "A Good War: Mobilizing Canada for the Climate Emergency"; columnist w/ Canada's National Observer; former social justice think tank director
https://www.sethklein.ca
https://sethdklein.substack.com
WRI Ross Center for Sustainable Cities @wrirosscities.bsky.social Helping cities make big ideas happen. A program of
@worldresources.bsky.social. Producer of http://TheCityFix.org. Home of #PrizeForCities.
Council for Canadian Urbanism @canurbanism.bsky.social The Council for Canadian Urbanism #CanU is a national organization of leading multi-disciplinary urbanists championing better city-building coast-to-coast! linktr.ee/canurbanism Conseil pour l'Urbanisme Canadien
Charles Montgomery @charlesincities.bsky.social Author, Happy City.
Founder, Happy Cities.
I post on the connection between design + social trust.
Cities, algorithms, laws and invisible systems.
🧠🏙️🌈🏔️
15-Minute City @15minutecity.com The #15MinuteCity: putting people at the center of urban transformation.
Posts by Dan Luscher.
Matt Hutchins AIA @matthutchins.bsky.social Principal at CAST architecture, urbanist advocating for housing options, 15-minute cities and sustainable construction. Passivhaus proponent. Former AIA Seattle President and Seattle Planning Commission Co-Chair
Chris Dymond @chrisdymond.bsky.social *Interested in tech and cities*
Director of the Smart City Management masters programme at Zigurat Institute of Technology | Co-director of Sheffield Digital | Founder of Unfolding ltd.
Jessica de Heij @jdeheij.bsky.social 15-minute cities advocacy | Urbanism | Sustainability | 🇳🇱🇳🇿
Views are my own
📍Ōtepoti Dunedin, NZ
Kees van der Leun @sustainable2050.bsky.social 40 years of experience in the energy transition. Building Common Futures, a new energy transition consultancy.
Posts about energy, climate, Ukraine & more.
Also on Mastodon.
Reposts not an endorsement, views my own. #EnergySky
Jeff Speck @jeffspeck.bsky.social Urban Planner, Partner in Speck Dempsey, author of Walkable City, Walkable City Rules, and other stuff I'd like you to read. 
Cathy Tuttle @cathytuttle.bsky.social I plan cities for people & other living things. I focus on SEA, PDX, Utrecht, women who create cities, bikes, climate. I'm on Boards @bikeloudpdx.bsky.social @streetsalliance.bsky.social & volunteer @ BikeFlip + DeFietsmeesters in Utrecht. She/her. PhD
Yonah Freemark @yonahfreemark.com Transport / Housing / Land Use / Politics / @urbaninstitute.bsky.social / Le progrès ne vaut que s’il est partagé par tous / yonahfreemark.com / thetransportpolitic.com
Jonathan Berk 🏠 @berkie1.bsky.social Supporting a new generation of walkable neighborhoods with housing abundance, active public realms, & thriving small business ecosystems. Founder remainplaces.com
EnergyFrin @energyfrin.bsky.social Associate Professor in Sustainable Urban Energy Systems #Complexity #ComplexSystems #Energy #Climate 
Amy Oen @amyoen.bsky.social Environmental scientist - working on risk, climate adaptation, NBS and urban issues - bridging the gap between climate information providers and users.
Geoffrey Singer @geoffreysinger.bsky.social Urban planner, climate action leader, transit enthusiast, map nerd. Check out my Toronto laneway and garden suites permits web map at https://arcg.is/1vTDSz
Jarrett Walker @humantransit.bsky.social Public transit planning consultant and commentator. Author of the book “Human Transit” and the blog HumanTransit.org. The consulting firm is jarrettwalker.com. Also obsessed with literature and plants.
Mike Lydon @mikelydon.bsky.social Co-Founder @ Street Plans | Co-Author #TacticalUrbanism, Smart Growth Manual, Streets for Pandemic Response + Recovery | Board Member @ Congress for New Urbanism | Creator Open_Streets Project | Léo + Luca’s dad | 📍 Brooklyn, NY 🚲 🚶 🚌 🌆
Mike Eliason @holz-bau.bsky.social climate adaptive social housing developer
architect for car-light climate forward cities w/ low carbon + passivhaus buildings, social housing
Author, 'Building for People' (Island Press, 12/2024: https://islandpress.org/books/building-people)
Zahra Tavakoli @zahratavakoli.bsky.social Urban Planner | Transport Analyst | Focused on Sustainable Mobility
Robin Chase @rmchase.bsky.social sustainable urban transportation. Co-founder Zipcar, NUMO #climate #cities #transport #justice #bikes. Also knitter, gardener, parent
Sightline Institute @sightline.org Think tank cooking up nonpartisan policy research on housing, energy, climate, and democracy in Cascadia. 🧠🍳 Likes/follows ≠ endorsements.
Newsletters: sightline.org/signup
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
The Overhead Wire @theoverheadwire.com Jeff Wood is the host of the Talking Headways podcast and the publisher of The Overhead Wire daily newsletter. http://theoverheadwire.com
Sign up for our 20 year old daily newsletter here: https://mailchi.mp/theoverheadwire/trial
Kent Lundberg @kentlundberg.bsky.social Sustainable transport and car optional cities. I lead a small company focused on public transport, urban design, parking reform and investment advice. Auckland, New Zealand.
Fietser @americanfietser.bsky.social "Fietser" (Dutch) 'feet-ser' Meaning: A Person Who Bikes For Transportation; Infrastructure, City Design, E-Cargo Bike Ambassador, Brasil 🇧🇷🔗, Train & Aviation Enjoyer
Steve Chambers @planningtransport.co.uk Transport and urban planning stuff. I run sustainable transport and environmental justice non-profits: @transportgood.org @transportfornewhomes.org.uk
Can also be found:
Ⓜ️ mastodon.cloud/@respros
📸 pixelfed.social/respros
🍴 beliapp.co/app/respros
Veronica O. Davis @veronicaodavis.bsky.social Author, Inclusive Transportation: A Manifesto for Repairing Divided Communities
veronicao.com
She/Her #TransportationNerd #InclusiveTransportation 🔺🐘
Shoshanna Saxe @shoshannasaxe.bsky.social Associate Professor of Civil and Mineral Engineering, @uoft, Canada Research Chair Sustainable Infrastructure. Research: How should we literally build the future? Industrial Ecology. Cities. Transport. Construction.
Amy Turner @amyturner.bsky.social Climate, cities, equity & law. Sabin Center for Climate Change Law, Sustainable Cities Fund and some other places.✨ MKE & NYC. 📚: “Urban Climate Law”
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.
Daniel Firth @danielfirth.bsky.social City policy nerd - urban planner - modernism appreciator - map fan 🏳️🌈 🇸🇪
Mitt hjärta har en frusen inneboende med pajat självförtroende som inte mår så bra
Savannah Cox @savannahcox.bsky.social Asst prof at Sheffield Uni.
climate-changed cities, politics, and markets.
ICLEI CBC @cbc.iclei.org ICLEI's Cities Biodiversity Center is hosted by ICLEI Africa & works to mainstream #naturebasedsolutions across the world.
Join #CitiesWithNature now!
ICLEI Africa @africa.iclei.org ICLEI is a global network of more than 2,500 local & regional governments committed to #sustainable urban development.
Local action for global change!
Marielle Papin @mariellepm.bsky.social Political Science Asst Prof | Canada Research Chair & Director, Research Institute for Urban Wellness @MacEwan University
Cities, networks, climate governance and urban wellness
I talk a lot about motherhood (in academia)
Catherine Queen @catherinequeen.bsky.social Senior Lecturer in Planning @ Uni of Liverpool. Public disengagement from planning for energy futures, inclusive cities, climate communication.
American Public Transportation Association @apta-info.bsky.social APTA leads public transportation in a new mobility era, advocating to connect and build thriving communities.
Women in Mobility @womeninmobility.bsky.social #Mobility #Future #Urbanization | Community for women working in the mobility sector |🇩🇪 🇪🇺 www.womeninmobility.org
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.
Tara Connolly @taraconnolly.bsky.social All things energy transition, climate justice and safe streets in the EU.
Formerly at Greenpeace, Friends of The Earth and Global Witness. Now working at @beyondfossilfuels.
Irish immigrant in Brussels.
Climate and Community Institute @cplusc.bsky.social Climate and Community Institute is a progressive climate and economy think tank. We work with movements and progressive policy makers to pass new policy, improve implementation, shift narratives, and deepen coalitions. 🌱 http://www.climateandcommunity.org
Anna Fahey @trufahey.bsky.social Thinktanking on housing + democracy + clean energy
Opinions—all mine. Or yours, recycled—as also mine. Zero endorsements here.
#Housing #affordability talking points galore
🏘️🎯➡️ https://www.sightline.org/the-pro-homes-messaging-toolkit/
#Parking feed ⬇️
Jon Burke🌍 @jonburkeuk.bsky.social Energy ⚡️ Waste ♻️ Transport 🚲 Public Realm 🌳
Words in HuffPost, Big Issue, Architects Journal.
Climate Emergency UK Advisory Board.
Enquiries - jonburkeuk@protonmail.com
www.jonburkeuk.com
C40 Cities @c40cities.bsky.social A network of city mayors delivering urgent climate solutions. Protecting the people and places we love. 🌳🌍🌆💚
http://www.c40.org/
Anuradha Mukherji @anuradhamukherji.bsky.social Social scientist. Working at the intersection of coastal climate adaptation, disaster recovery, land & housing, policy & governance.
Associate Professor|Community & Regional Planning @ ECU|www.anuradha.net
Pirate Name - Pearl
Alum, UC Berkeley & Texas A&M
Kian Goh @kiangoh.bsky.social Architect & urban planning professor @UCLA. Urban change & climate justice. Author of Form & Flow (MIT 2021) bit.ly/3Q92Mkd
Zachary Lamb @zacharylamb.bsky.social UC Berkeley, Department of City and Regional Planning.
'The Equitably Resilient City: Solidarities and Struggles in the Face of Climate Crisis' (MIT Press 2024)
https://mitpress.mit.edu/9780262549868/the-equitably-resilient-city
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
Andrew Rumbach @andrewrumbach.bsky.social Urban & regional scientist. Co-lead of the Climate & Communities program @urbaninstitute. Research & policy analysis on disasters, disaster recovery, precarious housing, land use, and adaptation. Sourdough enthusiast. https://andrewrumbach.substack.com
dr roger cremades @rogercre.bsky.social Climate Change, Complexity Economics, Systemic Risks, Cities, Cascades and Ecology @ University of Leeds.
Complex systems insights for sustainable futures.
Assoc Prof FRSA https://is.gd/1alYNP + https://is.gd/PfiCiI
Towards regional systemic risks.
Sara McTarnaghan @sara-mctarnaghan.bsky.social All things climate change, adaptation, and affordable housing. Social policy researcher and co-lead of the Climate and Communities Program at Urban Institute.
📍DC with past lives in SF Bay Area, Santiago and Austin. 
Ladd Keith @laddkeith.com Climate planner | Associate Professor & Director, Heat Resilience Initiative, University of Arizona | Helping cities plan for extreme heat 🏜️🏳️🌈 https://laddkeith.com
Liz Koslov @koslov.bsky.social Assistant Prof of Urban Planning, Environment and Sustainability, and Sociology at UCLA. Ethnographer of "managed retreat.” PhD in Media, Culture, and Communication from NYU.
Theo Lim @chaolim85.bsky.social Associate Prof, School of Community and Regional Planning, University of British Columbia
Environmental Sci and Planning | Local-Scientific Knowledge Integration | Urban Climate Adaptation
Jesse M. Keenan @jessemkeenan.com Favrot II Associate Professor of Sustainable Real Estate and Urban Planning, Tulane University https://jessemkeenan.com/
North: The Future of Post-Climate America (Oxford University Press)
https://global.oup.com/academic/product/north-9780197641613
Richard Dawson FREng @richdawson.bsky.social Engineer.
School of Engineering @newcastleuni.bsky.social
Researching the resilience and sustainability of water, infrastructure, urban areas in the face of global change.
@thecccuk.bsky.social Adaptation Committee member.
Joe Curtatone @joecurtatone.bsky.social President, The Alliance for Climate Transition (ACT). Former Mayor of Somerville, Massachusetts.
Rebecca Co @rebeccac0.bsky.social Fighting climate change via research, analysis, and accessible communication 🌎📚🔍
- Interests: science, cities, green infrastructure, urban heat, and sustainability
- Voracious reader, cinematic music lover; former environmental microbiologist
Ida Nilstad Pettersen @inpettersen.bsky.social Design research, sustainability, social practices, societal transformation, urban nature. Prof. at NTNU.
https://www.ntnu.edu/employees/ida.nilstad.pettersen
Greg Quetin @grquetin.bsky.social Scientist | Engineer | Cargo Bike Enthusiast. Romantic about the indelible nature of cities full of people living in every way imaginable. Day job - climate change, and the trees of it.
Felix Creutzig @efesce.bsky.social Bennett Chair University of Sussex and PIK Potsdam.
Climate change mitigation, especially cities, transport, and role of AI. Believes in human cooperation, urban planning, economics, and technologies. Make climate policy as if children matter. 
Diego Ramos Aguilera @d1egoramo5.bsky.social environmental engineering — university of southern california | researching heat in cities | interested in renewable energy, climate change, sustainable development, global south
https://s3research.usc.edu/about-us/diego-ramos-aguilera/
Rhi Faux @rhifaux.bsky.social MSc Environmental & Forest Science. Active transportation, climate, nature, parenting, running, social justice, urbanism. Work for a national health-focused environmental nonprofit. Volunteer with Vision Zero Vancouver.
Sara Fuller @sarakfuller.bsky.social Geographer, Macquarie University, Sydney. Researching climate change, energy, activism, cities, communities and justice.
Eugenie Waters @eugeniewaters.bsky.social Family Physician | Climate Action | E-Cargo Bike Mom | Ottawa
Leaning in for sustainable healthcare systems, safe active transportation networks, urbanism, biodiversity at the community level, greening schoolyards, and getting off fossil fuels. 
How-Sen Chong @how-sen.com Toronto urban environmentalist. 20+ years in climate activism. Fancy degrees from McGill and Yale. Posts my own.
Driver against car dominance. Renewables and battery storage maxxer.
https://how-sen.com/link
Mary Pustejovsky @mpusto.bsky.social Cargo bikes, urbanism, safe streets, climate. Heat pump all the things! Views are my own. #MadisonWI #EverTrue
Thorfinn Stainforth @bxlthor.bsky.social Senior Policy Manager, Environmental Defense Fund Europe. Focused on climate, transport, and urban policy. Brussels based. Opinions are my own.
Paul Angelone @angelone.bsky.social Work at intersection of the built environment, climate, and sustainability but post mostly about urban(ish) things and family adventures! | Washington, D.C.
https://www.paulangelone.com/
Alessandro Rigolon @alerigolon.bsky.social Associate prof of urban planning. Research on green space equity, green gentrification, climate adaptation, and health equity. Love SLC, my family, and the great outdoors. Opinions (good or bad) are my own 🇮🇹🇺🇸 🌩️👀 rJgnW3igNgz7
Dr David R Brake @drbrake.bsky.social Journalist, policy wonk (transit, urban planning, EVs, climate, internet/media regulation), PhD (Media@LSE), dad, newly-adoptive Brightonian
TC (Tirthankar Chakraborty) @tchakraborty.bsky.social Earth Scientist @ Pacific Northwest National Lab; previously Yale (PhD '21); more previously IIT Kanpur (M.Tech '15)
| urban climate | aerosols | remote sensing | heat stress | Google Earth Engine | geospatial | machine learning |
https://tc25.github.io/
Dr. Dasaraden Mauree @dmauree.bsky.social Decarbonisation / urban adaptation / climate resilience / sustainability
Décarbonisation / adaptation des villes / résilience / durabilité
Group leader at WSP
Mauritius 🇲🇺
Switzerland 🇨🇭
France 🇫🇷
Isobel Braithwaite @izzybraithwaite.bsky.social Public health Dr/researcher, London - Climate & health, housing, urban sustainability
Mason Hickok @masonhickok.bsky.social Story Desk Editor at KENS 5 News | Bylines: @mysanantonio.com, KSAT 12 News, The Paisano | Trail running, film, and more | Portfolio: https://authory.com/MasonHickok
Aimee Rawlins @aimeerawlins.bsky.social Seattle-based writer + editor covering climate, cities, housing, transportation, and all the ways they intersect.
John Stehlin @jstehlin.bsky.social Urban/economic geographer focused on the political economy of urban sustainability and transportation, Department of Earth Science and Geography, Vassar College
Liam K McGrath @liammcgrath.bsky.social Forecasting & modelling for sustainable cities Transport for London🚇 Director at Leathermarket CBS affordable housing 🏢 Director se1.solar Community Energy ☀️ Urban history podcast yeoldeguide.com
Personal opinions
liamkmcgrath.com
Helen Macintyre @drhelenmac.bsky.social Principal Climate Change Scientist working on climate change & health including spatial modelling, urban environment, air quality, heat and cold, and co-benefits of climate action inc nature based solutions. Former geologist. PhD in Atmospheric Chemistry. 
Dr Lizzy Lowe @lizzylowe.bsky.social Working to create sustainable cities 🏙️
& ecosystems full of invertebrates 🐞
Inordinately fond of spiders 🕷️
Research Fellow at ECU 🌱
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.
Mallory Baches @mallorybaches.bsky.social AICP, LEED-AP, CNU-A
Urban design, sustainable cities, ND Football
Mom, President of @cnunewurbanism.bsky.social
@ox.ac.uk and @ndschoolofarch.bsky.social alum
www.cnu.org
Andy Barenberg @andybarenberg.bsky.social Economist. UMass Amherst/UMKC trained. Bike Commuter. Soccer Coach. Currently focused on making cities equitable and sustainable. 
Nina Kelly, PhD @nina-eliz.bsky.social asst prof of organizational communication | civic info & political participation/communication researcher | urban & regional planner (AICP) | MI—> CT | flâneuse | views are my own
TR Jeffery @trjeffery.bsky.social I lead a small govt organization at the intersection of water resources, climate resilience, and urban planning. Using nature based solutions to protect water resources and build resilience. Administrator at RPBCWD. Views expressed are exclusively mine.
Niki Frantzeskaki @nfrantzeskaki.bsky.social passion for research of/with cities, climate change, resilience & sustainability * urban nature-based solutions governance * professor of urban & metropolitan transitions & governance * she/her 🇬🇷🇪🇺
Harrison Watt @harrisonwatt.bsky.social Advocating for sustainable cities and active transport 🌳🚲🚶🏳️🌈
2030hub @2030hub.bsky.social Accelerating sustainable cities and business.
World's first Local2030 Hub. Certified B Corp. ❤️ SDGs
Clare Heaviside @climateclare1.bsky.social Associate Professor at UCL working on urban climate, heat and health. NIHR funded population health fellow. Musician, living in Oxford.
Pedro Peterson @peterpedroson.bsky.social I work at the intersection of urban mobility, land use, and climate.
I occasionally post about Brazil, music, and football (the one played with feet).
Views are my own.
Qagggy! @qagggy.bsky.social 📍Seattle/London. Board member at Seattle Streets Alliance. Opinions amirite. Safe, sustainable, equitable, healthy cities. Dongho Chang superfan. (he/him)
Jen Mapes @mapesgeog.bsky.social Community geographer, cartographer, pedestrian, cyclist. Author of "The New American Small Town: Lessons for sustainable urban futures" (West Virginia University Press, June 2025). https://communitygeography.kent.edu/
Mat Lipson @mlip.bsky.social Climate scientist. Focussed on developing better urban climate models.
http://isithotrightnow.com | http://theurbanist.com.au
TREC at PSU @trecpdx.bsky.social Portland State University's Transportation Research and Education Center (TREC). Home to the Initiative for Bicycle and Pedestrian Innovation (IBPI), transportation data programs PORTAL & BikePed Portal, Better Block PSU, and PSU's membership in PacTrans.
Urban Institute @urbaninstitute.bsky.social The Urban Institute is a research-to-impact institution founded on one simple idea: To improve lives and strengthen communities, we need practices and policies that work.
City Observatory @cityobservatory.bsky.social Original research and commentary on what matters for city success.