Climate Change
Greenpeace
We're an independent global campaigning organisation acting to change attitudes and behavior, to protect the environment and promote peace.413,477 followers | Follow
Nature News&Comment
The latest science news and opinion from Nature magazine. Winner Best Twitter, Online Media Awards 2011. Most tweets by @BL_Owens, @Ananyo and @bmahersciwriter313,170 followers | Follow
Nature Conservancy
The Nature Conservancy welcomes you to its official Twitter site! We're a leading conservation organization working for people and nature.100,238 followers | Follow
350 dot org
Join a global movement that's inspiring the world to rise to the challenge of the climate crisis. 350=safe upper limit of CO2 in atmosphere. Photo by @julkosch85,478 followers | Follow
HuffPost Green
Latest environment & energy news, green-IY projects, animal stories & more (contact: huffpostgreen@huffingtonpost.com)81,570 followers | Follow
National Wildlife
National Wildlife Federation works to inspire Americans to protect wildlife for our children's future. Staff updating: @starfocus @rarewildlifeguy @ksuzj76,673 followers | Follow
Guardian Environment
Green news, comment & more, run by the environmentguardian.co.uk team, inc @james_randerson & @adamvaughan_uk & @dpcarrington71,293 followers | Follow
Earth Hour
Earth Hour 2012: 8.30pm, Saturday 31 March – switch off the lights and celebrate your action for the planet with the world.55,377 followers | Follow
MyWindPowerSystem
MyWindPowerSystem.com are the No. 1 Wind Turbine Brokers on the net and are dedicated to renewable and alternative energy tech news with a scientific approach44,707 followers | Follow
WWF_Climate
WWF is no longer using this Twitter account. Please follow @WWF for all WWF climate and environmental news.44,638 followers | Follow
Friends of the Earth
Friends of the Earth campaigns for solutions to environmental problems.35,919 followers | Follow
Greenpeace UK
Climate, forests & oceans news, the latest on Greenpeace UK campaigns & actions live coverage. Like us on fb.com/GreenpeaceUK & watch youtube.com/GreenpeaceUK35,331 followers | Follow
Earth Institute
Mobilizing the sciences, education and public policy to achieve a sustainable earth31,213 followers | Follow
Andy Revkin
Pursuing ways to forge progress on a finite planet on http://j.mp/dotEARTH and at Pace U. The rest? Family, friends, living, music: http://j.mp/unclewade31,175 followers | Follow
The Ecologist
The Ecologist - setting the environmental agenda since 1970. Like us on facebook: http://www.facebook.com/TheEcologist28,187 followers | Follow
World Resources Inst
Environment and human needs - climate change, global warming, ecosystems, green business, sustainable markets, good governance, sustainable development25,341 followers | Follow
Environment Agency
It's our job to look after your environment and make it a better place.23,841 followers | Follow
Climate Progress
Blog dedicated to providing the progressive perspective on climate science, climate solutions, and climate politics.23,495 followers | Follow
British Red Cross
The British Red Cross helps people in crisis, whoever and wherever they are.23,369 followers | Follow
Yale Environment 360
Opinion, Analysis and the Latest Environmental News - A Publication of the Yale School of Forestry & Environmental Studies.20,204 followers | Follow
Green peace
18,841 followers | Follow
David Roberts
Seattleite transplanted from Tennessee; now blogging for Grist about energy politics. Climate hawk, deficit dove.18,214 followers | Follow
NYTimes DotEarth
NYTimes.com/DotEarth is Andrew C. Revkin on Climate Change and Sustainable Living18,148 followers | Follow
UN Climate Change 09
United Nations Climate Change Conference 2009 in Copenhagen (COP15), brought to you by the Ministry of Foreign Affairs of Denmark17,758 followers | Follow
EPS Climate
Eco Preservation Society: No Politics, No Propaganda, No Bull:17,599 followers | Follow
The Climate Group
An independent, not-for-profit org working with government + business leaders to drive a #CleanRevolution. Use # to show the #CleanRevolution in action for RTs.17,157 followers | Follow
NYTimes Environment
Breaking news and environmental news on the EPA, oceans and marine life, weather, wetlands, pollution, wildlife, global warming, hybrid cars, energy and nature.15,732 followers | Follow
Erik van Erne
Green Sustainable News: earth climate renewables water cradle to cradle c2c - nieuws blogger communicatie pr social media en oranje fan http://bit.ly/fqDgUQ14,713 followers | Follow
Global Warming
Global warming, climate change and environment news. See also @greennews and @science14,586 followers | Follow
Greenpeace Canada
An independent campaigning organization that uses non-violent, creative confrontation to expose global environmental problems, and to force solutions.13,187 followers | Follow
Worldchanging
Hi. We are back. In November we will begin to blog and in the spring we will merge with the @openarchnetwork12,791 followers | Follow
Green Awards
The INTERNATIONAL GREEN AWARDS™ recognises inspiring, innovative and creative approaches to sustainability showcasing stellar examples of best practice.12,145 followers | Follow
LA Times Environment
Environmental news from California & beyond. See latimes.com/tweets for more Los Angeles Times news streams.12,096 followers | Follow
Carbon Gurus
CPR for the Earth -Carbon Trading, Carbon Credits, Carbon Investing and Reforestation10,530 followers | Follow
quippd Environment
10,175 followers | Follow
CARBON NEWS
Carbon News...The Carbon Economy Experts. Our new website launching soon. www.CarbonNews.com10,172 followers | Follow
Green Bubble
Environmental news, and information regarding renewable energies, the environment and green technologies9,726 followers | Follow
World Development
The World Development Movement campaigns for justice for the world's poor. Campaigns: food speculation and climate debt.Tweets by @pontusw & @miriamross19,644 followers | Follow
EnergyBoom
Scouring the globe for the latest renewable energy and tech news so you don't have to!9,221 followers | Follow
Farming First
Farming First is a global coalition calling on world leaders to increase agricultural output in a sustainable and socially responsible manner.9,037 followers | Follow
Wildlife SOS India
I'm Kartick Satyanarayan, co-founder of Wildlife SOS in India. We work to make a difference to the planet!8,821 followers | Follow
Planet Forward
We feature innovations in sustainability, climate change and energy. Also http://www.facebook.com/planetforward.org and http://www.youtube.com/planetforwardtv8,429 followers | Follow
Growing Power
MKE and CHI urban farms helping to provide equal access to healthy, high-quality, safe and affordable food for people in all communities.8,293 followers | Follow
United Nations DSD
United Nations Division for Sustainable Development promotes & is a source of expertise on sustdev in the UN8,013 followers | Follow
Carbon Finance
Carbon Finance International - Financial Innovation in the Carbon Markets7,669 followers | Follow
Stop Climate Chaos
The Stop Climate Chaos Coalition is the largest UK coalition tackling climate change issues.7,571 followers | Follow
Ecojustice Canada
Ecojustice is Canada's leading charity using the law to protect the environment7,122 followers | Follow
AP Climate Pool
News, discussion and a behind-the-scenes look at climate change & environment issues from The Associated Press, the essential global news network6,835 followers | Follow
Hopenhagen
Hopenhagen is a community striving to lead our leaders to make the right decisions at the UN Climate Change Conference in Copenhagen, Denmark, December 2009.6,290 followers | Follow
CleanTechnica
News and commentary on solar energy, wind energy, wave energy, energy efficiency, & more. For more commentary, check out the site director's acct @zshahan36,210 followers | Follow
Permaculture Mag
Permaculture gets to the heart of sustainable living internationally. Available quarterly by post or download and online daily. Follow our editor @maddyharland6,202 followers | Follow
Environment America
Environment America is a federation of citizen-funded organizations that advocate for clean air, clean water, and open spaces in 29 states and Washington, DC.6,186 followers | Follow
WB Climate Change
A World Bank blog on Development in a Changing Climate -- Making Our Future Sustainable5,973 followers | Follow
Worldwatch Institute
Global environmental research organization focused on building a low-carbon energy system, creating a healthy future for agriculture, and developing a green eco5,663 followers | Follow
RainforestSOS
Working with governments, business, NGOs and individuals to increase global recognition of the contribution of tropical deforestation to climate change5,324 followers | Follow
Brad Johnson
ThinkProgress Green (@TP_Green) Editor at the Center for American Progress. Opinions are mine alone.5,213 followers | Follow
Environment Oregon
State-based, citizen-funded, and member-powered group working for a cleaner, greener, and healthier Oregon5,123 followers | Follow
Jeff Henry
Increasing the use of solar energy will provide a clean, reliable and domestic source of energy while creating millions of new jobs. Creating Solar Securities4,850 followers | Follow
Our World 2.0
Web magazine about climate change, oil depletion, food security and biodiversity - created by the UN University.4,726 followers | Follow
Ethical Trust Mentor
We put advisors into public and private start up companies to help the companies become green and more socially responsible4,634 followers | Follow
Climate Change Facts
Unbiased climate change facts with links to major organizations. Owned by @DrJohnEverett, tweets by @slelinhares4,464 followers | Follow
Green Alliance
Green Alliance is an influential environmental think tank working to ensure UK political leaders deliver ambitious solutions to global environmental issues.4,428 followers | Follow
Victoria Kamsler
Ex-Princeton environmental ethicist, Co-founder of Skybase (@solarflight), Chief Research Officer at Katerva (@katerva)4,202 followers | Follow
Climate Change News
Latest news from the web on climate change/global warming4,123 followers | Follow
The Environment Show
No.1 independent environment podcast in Australia and NZ. Leading sustainability blog. (Follow the producer @PhilStubbs)4,017 followers | Follow
Laurie David
Enviro mom, advocate, author. Follow @famdinner for issues related to my new book The Family Dinner: Great Ways to Connect with Your Kids, One Meal at a Time.3,874 followers | Follow
Climate Cycle Africa
A project to give voice to those experiencing climate change.3,546 followers | Follow
Environment Matters
The World Bank Group is the largest financier of biodiversity and works with developing countries to safeguard the environment and achieve economic growth.3,162 followers | Follow
Katherine Goldstein
Innovations editor, focusing on social media and traffic initiatives for Slate.com. I also write essays sometimes.3,080 followers | Follow
EarthPolicyInstitute
Dedicated to planning a sustainable future as well as providing a roadmap of how to get from here to there.3,004 followers | Follow
Orion Grassroots
We track grassroots efforts to make ecological, social, and cultural change worldwide. A project of Orion magazine.2,943 followers | Follow
CGIAR Climate
The CGIAR Research Program, Climate Change, Agriculture & Food Security (CCAFS) seeks to overcome the threats to ag & food security in a changing climate.2,854 followers | Follow
FAO Climate Change
News and events on food security and climate change from the Food and Agriculture Organization of the United Nations (FAO)2,700 followers | Follow
adopt a negotiator
We're a platform for young people tracking our countries' roles in #UNFCCC / #climatechange negotiations. Fighting for our future. Proud part of @tcktcktck.2,663 followers | Follow
BeThatChange
An online movement for change that calls for an end to poverty and a future for our planet. Visit www.bethatchange.com2,626 followers | Follow
Climate Crisis
Fact:The World's Climate is in Crisis. Mounting evidence shows that humans haven't helped. We have to find solutions to these problems... together.2,474 followers | Follow
Conservation Letters
Fast, global and policy-relevant, Conservation Letters is an online-only scientific journal publishing research with significant implications for conservation2,430 followers | Follow
CleanerGreenerChina
2,337 followers | Follow
Avaaz Copenhagen
Avaaz Copenhagen er et lokalt netværk under Avaaz.org, hvis aktiviteter er særligt rettet mod COP15, FN's klimatopmøde i København den 7. – 18. december 2009.2,179 followers | Follow
Green Challenge
The Postcode Lottery Green Challenge: Save The Planet and win €500,0002,099 followers | Follow
GreenTweet Europe
GreenTweet Europe is a Brussels-based United Nations hub for #environmental #news & #ideas with a #young, #European perspective. #Green #UN2,076 followers | Follow
Go-Green-Save-Green
Loads of Information and Forum to learn how to live a green lifestyle and save money too.2,064 followers | Follow
WWF-US Climate
World Wildlife Fund (WWF), US: Climate Change Program. Combatting climate change and preparing for its consequences.1,986 followers | Follow
Energy Digital
The online magazine & website for the hottest topics across the oil & gas, renewables, mining & utility sectors. All tweets by @EnergyDigital Editor Carin Hall1,979 followers | Follow
Green Report Card
Published by the Sustainable Endowments Institute, the College Sustainability Report Card grades 300+ colleges across the US and Canada on green initiatives.1,871 followers | Follow
WorldHealthOrg
Promoting the link between Climate change and impact on Health1,801 followers | Follow
Climate Change
Sustainability and strategy consultant musing on strategy, products, climate change, people, policies, liabilities and opportunities.1,715 followers | Follow
B4E Global Summit
We are an international business and environment conference that promotes dialogue on sustainable development among business leaders and other stakeholders.1,711 followers | Follow
WeCan EndPoverty2015
The European Arm of the United Nations WeCanEndPoverty Campaign Join our Ad Competition NOW!1,664 followers | Follow
knowledge.cta.int
Observatory on Science, Technology and Innovation for ACP Agricultural and Rural Development / également disponible en français1,562 followers | Follow
Green Week
Last #GreenWeek Conference 2011 Resource efficiency - Using less, living better Manuel @REMAXmontijano New Media Strategy @ClimateReality_ Spain1,375 followers | Follow
Avoid Global Warming
Stop Global Warming! Everything you need to know Mashed with related videos, tweets and digg stories!1,323 followers | Follow
Klimaforum09_Team
Klimaforum09 is a global climate event taking place in Copenhagen 7.-18. December, alongside the COP15.1,303 followers | Follow
Guardian Cleantech
Bringing together policy makers, investors, cleantech companies and entrepreneurs to explore ways to develop and grow the cleantech industry1,292 followers | Follow
Climate Change
Real time updates on climate change and global warming issues and policies1,282 followers | Follow
World Climate Ltd
World Climate Ltd (WCL) is dedicated to accelerate the global green economy. WCL organises the World Climate Summit & the World Green Summit.1,201 followers | Follow
Susan Buzzelli
Leading the discussion on food security-environment policy. IFPRI's Environment & Production Technology Div is based DC but known across the globe.1,164 followers | Follow
Carbon Footprint Ltd
Carbon Footprint Ltd is a leading carbon management consultancy that helps businesses to reduce costs and emissions, meet legislation and win more business.1,125 followers | Follow
Inside Cop15
Media-focused tweets and video content from inside the UNFCCC Copenhagen Summit1,121 followers | Follow
AfricaAdapt
Knowledge sharing for climate change adaptation in Africa - Le partage de connaissances pour l'adaptation aux changements climatiques en Afrique1,011 followers | Follow
Gilda Bibiano
Arquitecta, ecologista, permacultura, geometria sagrada, ecoaldeas, sustentabilidad,terapia homa. mail gabibiano@gmail.com980 followers | Follow
MeineGrueneWelt
A former environmental lawyer and a marketing and communications pro - trying to help create a better, greener world...898 followers | Follow
Gaining Ground 2010
The Power of Green Cities to Shape the Future (Geoff Gosson)851 followers | Follow
Practical Action
News and views from Practical Action's energy and climate change campaigns738 followers | Follow
Climate Change_IDS
Pioneering research and knowledge partnerships for development in a changing climate672 followers | Follow
Write Here Right Now
A team of 13-19 year old youth reporters doing their bit to save the world!645 followers | Follow
UNEP/GRID-Arendal
GRID-Arendal is a collaborating centre of the United Nations Environment Programme (UNEP).642 followers | Follow
UNDP Adaptation
Community Based Adaptation for Climate Change Adaptation Assistance Worldwide619 followers | Follow
Earth Governance
Information, news, articles and commentaries on a wide range of issues related to environmental governance science, policy and practice.520 followers | Follow
Fauna Forever
Join us to catalogue, monitor and above all conserve the biodiversity of the greatest rainforest on Earth - the Amazon.510 followers | Follow
NaturalStepNetNews
Sustainability news from around the web, courtesy of The Natural Step484 followers | Follow
Global Observatory
The Global Observatory is designed to make the agreements reached at COP15 count.390 followers | Follow
FairClimateFund
Het FairClimateFund helpt particulieren, bedrijven en non-profit organisaties met het scannen, reduceren en compenseren van de CO2-uitstoot.371 followers | Follow
Lee Tablewski
Training & Project Mexico Director at the Institute of the Americas at UCSD (Tweets here are my views). IOA-related Tweets @iamericas320 followers | Follow
Coops Europe ACT!
Cooperatives Addressing the Climate Threat www.actonclimate.coop289 followers | Follow
Climate Change (SA)
Kathmandu To Copehagen - A South Asian Regional Conference on Climate Change - August 31 - September 1, 2009285 followers | Follow
Rebecca Short
I do communications advice and writing for a living. I tweet about climate news, sustainability, books, comms & things that make me smile. Photo: Cooper Creek.252 followers | Follow
UPM Climate Change
University of the Philippines Manila Global Climate Change Conference October 22-23, 2009 @ Pearl Garden Hotel203 followers | Follow
SecureAmericanFuture
Secure American Future is a program of the American Security Project. We believe that climate change is a real and growing threat to our national security.196 followers | Follow
Nina Becker
Development economist specialized in natural resources and climate change. Research fellow; IPCC Chapter Scientist.141 followers | Follow
Karen Mortensen
♫Singer/Songwriter/Musician♫ Ƹ̵̡Ӝ̵̨̄ƷArtist/PhotographerƸ̵̡Ӝ̵̨̄Ʒ ♥Poet/Writer♥ passionate about life, family, spirituality, consciousness and saving the planet♥140 followers | Follow
Three Degrees
Tweet @ us if you will be viewing the live webcast for the Three Degrees Conference. Send feedback as you view!130 followers | Follow
zainorfarah
58 followers | Follow
ZainuddinNoor
53 followers | Follow
Carbontech
46 followers | Follow
Carboncyclesandsinks
Policy development project for land-based C sequestration38 followers | Follow
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