Tree Huggers

Al Gore

2,418,697 followers |

Scientific American

Scientific American Magazine and online, over 165 years of science news
366,689 followers |

Nature Conservancy

The Nature Conservancy welcomes you to its official Twitter site! We're a leading conservation organization working for people and nature.
119,103 followers |

Pacific Islands NPS

Experience YOUR National Parks every day! Aloha, Talofa, & Hafa Adai! (Note: Following, Mentions, etc do not necessarily = endorsement)
98,891 followers |

Viking Services

Everything related to alternative energy, solar, wind and geothermal
81,175 followers |

Michael Sprague

Water holds a kind of magic. It calms us. It lifts us. Ultimately it sustains us.
50,110 followers |

Mongabay

Mongabay.com is an environmental science and conservation news site founded in 1999.
46,392 followers |

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 approach
44,202 followers |

Greenpeace UK

Climate, forests & oceans news, the latest on Greenpeace UK campaigns & actions live coverage. Like us on fb.com/GreenpeaceUK & watch youtube.com/GreenpeaceUK
39,901 followers |

Care2.com

With over 19 million members, Care2 is the largest social network of activists making a difference and living healthy.
37,361 followers |

CareNews

Care is place for people who care to make a difference in their lives and the world.
35,234 followers |

Eco Preservation Soc

Eco Preservation Society: Conservation, Reforestation and Education. We bring it together. Get conected, Get Involved, Make a difference.
33,745 followers |

Kate Sheppard

Reporter at Mother Jones covering energy, environment, reproductive rights, etc. Contributor with Current's Countdown. Also like: running, bikes, books.
29,119 followers |

Mud Baron

2012 #food & 2011 #green shortyawards winner 4 all things #schoolgarden. Lexicon Project ranter. Muir Ranch teacher+dahlia rustler. Banish'er of asphalt 4 kids.
25,036 followers |

EDF

Environmental Defense Fund - We work directly with businesses, government and communities to create lasting solutions to the most serious environmental problems
23,712 followers |

RayBeckerman

Law, social justice, nature, human & animal rights, the arts, ecology. Progressive. I try to lend my voice to the voiceless. http://is.gd/cNFKN
22,372 followers |

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.
20,262 followers |

American Wind Energy

AWEA is the voice of wind energy in the U.S., promoting renewable energy to power a cleaner, stronger America. On Facebook: http://www.tinyurl.com/AWEAFacebook
17,178 followers |

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.
16,870 followers |

IUCN

IUCN is the world’s oldest and largest global environmental network - a democratic membership union with more than 1,000 government and NGO member organizations
15,959 followers |

Tom Savage

Social entrepreneur, simplifier... currently founder of 3Desk
15,288 followers |

Wiser.org

Founded by Paul Hawken - Tweets by Peggy, Executive Director - Wiser.org Connects You to Communities of Action - Social network for sustainability
15,190 followers |

Virginia State Parks

Beautiful locations for outdoor recreation across Virginia
14,899 followers |

CarbonPig

Find Green Reviews and Eco Products on CarbonPig.com
13,835 followers |

Thomas Nordwest

Energy Channeler and sound artist.
13,787 followers |

RMSorg

I am a Christian, a wife, a mother and a business owner. I love organic products and exercising is My time. I love living a full life! How can I help You?
13,501 followers |

Derek Markham

Generally green, sprinkled with randomness & slathered with peanut butter. Writer for TreeHugger.com and Discovery. Good man. Skilled shoveler. WordPress lover.
13,386 followers |

Peter Kobel

Writer, author, advocate for environmental, economic and social justice.
12,860 followers |

Jaymi Heimbuch

Green Technology Editor and writer @TreeHugger. Environmentalist and photography enthusiast.
11,862 followers |

Solar Sister

Light. Hope. Opportunity. Using the power of women's enterprise to distribute clean energy technology in rural Africa.
11,256 followers |

dusty gedge

biodiversity professional, green roof campaigner/designer,public speaker, ecosystems services and green roof trainer - indigenous people + justice
11,254 followers |

_Margie

Ecology/ Animal Behavior. Photography, Wildlife, Birds, Wilderness, Travel, Ski, Hike. http://mkinneyphoto.wordpress.com
11,202 followers |

Phil Radford

Husband, poker player, Greenpeace Executive Director
10,847 followers |

Solazyme

Solazyme, Inc. is an industrial biotechnology company using standard fermentation facilities to produce renewable oils and bioproducts using microalgae.
9,483 followers |

Enviro Smith

Environment activist, alternative energy, save the planet
9,476 followers |

PattyHankins

In search of the next beautiful flower to photograph - Does life get any better than this? :-) Author of Wildflower Meditations: A Gift for the Spirit
8,884 followers |

Michael G.R.

I work for the Discovery Channel as a Science/Tech/Transportation writer for TreeHugger and Planet Green.
8,039 followers |

Baut Images

Contemplative PhotoArt, poetry, Eastern philosophies, metaphysics, human rights advocate. Coordinator #NWCU http://youtube.com/user/gendaikishihan/
7,751 followers |

NCAR+UCAR Science

National Center for Atmospheric Research & partners-climate weather meteorology ocean solar physics chemistry environment science education-no endorsements made
7,749 followers |

High Country News

An independent news magazine for people who care about the West's environment and people, publishing online and in print media.
7,632 followers |

AP Climate Pool

News, discussion and a behind-the-scenes look at climate change & environment issues from The Associated Press, the essential global news network
7,569 followers |

Henricus Peters

Making conservation connections - about children & Nature, Environmental Education, Playoutdoors and Sustainability. Also at @NAEE_UK. Fuller discussions at
7,463 followers |

Cari Holder

Sharing with friends on Twitter...
6,914 followers |

NRDC Switchboard

This is a feed of posts from NRDC's staff blog, Switchboard. Follow @NRDC on Twitter for more updates.
6,842 followers |

Lynn Hasselberger

I Count for myEARTH. Blog + tweets 2 raise awareness + inspire change 4 people + planet. Tweets by founder @LynnHasselbrgr who also tweets 4 her biz @myEARTH360
6,824 followers |

Taylor Loftheimer

I am actually a professor. I lecture at a very prestigious Uni I won't name here. The links I post are to my favorite pop-eco media.
6,544 followers |

Don Carli

Digital Strategy, Media, Marketing, Advertising, Sustainability, CSR, Green, Design, Print, SoLoMo, Publishing, InfoViz, Energy, Innovation, Diversity Inclusion
6,504 followers |

Dennis Schvejda

Former NJ Sierra Club Conservation Director... advancing conservation & protecting the environment via social media.
6,442 followers |

Michael Pata

Entrepreneur, Animal Enthusiast, Social Media, Sustainability, Wildlife, Pets, Environment, Aquaculture, Fun
6,300 followers |

Joanna Cerazy

Passionate author, researcher, educator, and parent. Co-author of Lead Babies.
6,186 followers |

Listening Earth

Add nature to your playlist! nature sound albums, transporting you to pristine, wild places and reminding you of nature's gentler pace of life.
5,519 followers |

Green Investment

Sustainable, Renewable and Cleantech Investments. Currently offering Timber/Forestry and Solar Investments
5,516 followers |

Carl Black

Life Observer, Sustainable/Organic Lover, Creative, Urban Explorer, Photographer, Volunteer, Writer, Listener, social media monster (per @cl_atlanta)
5,297 followers |

Lisa Vickers

Ecocentric activist. Global Campaigner @Avaaz. Usually tweeting about environmental, social and political change & my dog. Opinions are only mine.
4,982 followers |

Green Meme

Latest environmental news headlines from news sources and organisations around the web (live feeds).
4,721 followers |

Arctic Sea Ice News

Follow updates to the National Snow and Ice Data Center: Arctic Sea Ice News & Analysis. For questions, please visit our Web site.
4,557 followers |

Alan Nogee

Clean energy consulting. Former Union of Concerned Scientists Clean Energy Program Director. Tweeting on renewable energy, coal, nuclear, climate.
4,254 followers |

Marnie Glickman

Managing Director of the Green Party of California @gpca & Montessori mom
4,190 followers |

Cindy

Ret. HS Chem teacher, wildlife gardener, accidental birder, all around tree hugger & political junkie, who loves to take pictures.
4,005 followers |

Paul Jimerson

Artist, Photographer, Environmentalist, Psychotherapist, Former Radio Personality, Animal Hugger, Ocean lover
3,820 followers |

Climate Week

Climate Week is a supercharged national campaign to inspire a new wave of action on climate change taking place on 12-18 March 2012.
3,647 followers |

TRW

Rude, foul & #NSFW. #Trayvon, #OWS, #Obama, #p2, #p21, #ProChoice, #WoW, #StopRush. Non-religionist. Contributor at Alan Colmes' Liberaland.
3,520 followers |

Candace

∞ Herpetological Field Adventures ∞ Home of The Herparazzi ∞ It's not just about the animals ... it's also about the adventure! ∞
3,518 followers |

B.L. McMillan

4th Gen Florida native, political creature, environmentalist, extensive reader, animal nonprofit, Lion
3,386 followers |

Marghanita

Founder of Let's Go Outside Revolution. Children's Author & Illustrator - Nature based books. Mother of 3. Passionate about connecting children with nature.
3,331 followers |

John Gaudet

As a young ecologist I was challenged by the study of papyrus swamps in Idi Amin’s Uganda. Once worshipped by ancient Egyptians papyrus needs your help now!
3,330 followers |

National Parks Blog

Community blog for all those that love national parks: share photos, tips and finds
3,274 followers |

Linda Rockwell 鳥の写真

Lawyer, social birder, casual photographer, dog lover, inspired cook, New Mexican. 鳥の写真
3,168 followers |

Marine Conservation

Marine Conservation Institute - protecting ocean life through science and conservation advocacy. RTs not always endorsements, but informational.
3,133 followers |

Frances Moore Lappe

writer, world hunger and poverty expert, democracy advocate, author of Diet for a Small Planet, co-founder of the Small Planet Institute
3,101 followers |

WildForests

❀ Promoting the UN's 'Decade of Biodiversity' with tweets about forest ecology, conservation of biodiversity & eco-politics. #ancientforests
3,066 followers |

SouthMarch Coalition

Dedicated to saving Ottawa's South March Highlands and its species at risk from development. (tweets by Mitch Brisebois)
2,966 followers |

Adam Jack

Passionate about wildlife watching & wildlife citizen science and all things critter. Tools & mobile applications for naturalists & nature lovers.
2,940 followers |

Beth Lynn Goldman

Social Entrepreneur & Digital Correspondent. Played Division I College Hoops. Relentlessly Optimistic. Loves Style, Fashion, Culture, & Running.
2,879 followers |

Green USA

Green living exposed! ... tweets about green America. #green #eco
2,840 followers |

Meredith

Daydreamy mystic, word magician, nature goddess, stumbling domestic, organic gardener, photographer, and all 'round creative mess (according to hubby).
2,781 followers |

RLMiller

I tweet way too much on hawks climate and otherwise, #CA26, #p2, my puppy. Editor, PCNEnvironment and PCNNatRes, exec. board of CADEM Enviro Caucus, blah, blah.
2,777 followers |

Nancy Martini

Artist - My body of work is about environmental issues
2,560 followers |

Neil Richards

Ran marathons for @savetherhino & @orangutans. Now I care just as much about conservation, just don't run quite so far. New blog for 2011!
2,454 followers |

B Karasik

My loyalty is to justice and the planet, but hilarity will get you far.
2,395 followers |

New Energy

Pickens Plan Opportunity - Make money from home and change the Planet
2,379 followers |

Karen E McKelvey

Time to step out of comfort zones, to help keep the wonder of our planet alive. What do you say? Let's go make a difference together.
2,173 followers |

John

Birder, blogger, environmentalist. Feel free to ask questions, or include @dendroica in a tweet if you want me to see something.
2,097 followers |

Yvonne Pembroke

Ex Fashion Designer... Ecologica is an online membership based forum sharing eco/organic tips and product ideas between members.
1,972 followers |

Grim

Laidback workaholic???
1,968 followers |

EarthFirst.com

A fun, irreverant green blog featuring the latest environmental news, exclusive features, original cartoons and videos.
1,961 followers |

Dayna Reggero

Traveling Gypsy. #Eco Spokesperson. #Vegetarian. #Organic. @JerryJamesStone's Tour Manager. @PachasPajamas Promoter.
1,920 followers |

Eric Laczi

My Interests Include: wildlife, nature, trees, coffee, beer, supporting local businesses, photography & I love Kentucky basketball. Go Big Blue! #BBN #WeAreUK
1,852 followers |

iLoveMountains.org

1,823 followers |

DCEcoWomen

A community of women inspiring each other to create a healthy and equitable society. Our mission is to provide an educational forum for women that's empowering.
1,787 followers |

Forest Justice

Forest Justice wants YOU to work with us to have an impact on reducing tropical deforestation. Check us out on www.facebook.com/forestjustice and Get Involved!
1,742 followers |

Grace Cunningham

Environmental latte-sipping, public-transit-&-bicycle-riding, urban-living liberal. Loves to dance, cook, and explore creative ways to change the world.
1,697 followers |

Heidi Marsh

Pool2Pond, MarshLand US, environmentalist, Master Naturalist
1,593 followers |

Ann Ranlett

Artist and Illustrator. Pet Portraits & Animal Art. Detail Freak. Bio-Nerd. Birder.
1,577 followers |

mona

In love with all of Nature tho birds do have a special place in my heart.
1,510 followers |

Wren

a nature lover and tree hugger, with wide variety of interests, the natural result of a lively and inquiring mind.
1,508 followers |

Stephen Rene Tello

I am the Executive Director of Primarily Primates, Inc., the oldest primate sanctuary and one of the largest animal shelters in the country.
1,411 followers |

Brian Juanhijo

Innovation in Information platforms changes culture, institutions, tools, and economy. Family guy, Socratic Tinkerer, Political. Opinions are mine alone.
1,370 followers |

Megan McVey

Conservationist. Social Entrepreneur. Intellectual Enzyme. Yale F&ES grad student. Tweeting for @yalefesclimate.
1,359 followers |

Scott

ecoflora is a fair trade, organic & 'deep local' florist in Toronto. From Beets, Beats to Beatport & Blues #Foodie #EDM #AZALEAN #Monster
1,348 followers |

Mark Robinson, Ph.D

Bio/comp geek with a passion for wildlife, mountains, whisky, beer and books.
1,341 followers |

IBWhitty

Child at heart with a woman's soul. Wildlife and nature lover. Passionate about history, art, travel, music, the mountains and ocean. Seashells are my diamonds.
1,291 followers |

Elizabeth Hargrave

Plants, animals, and wild places in the Washington, DC area: a true wealth of nature. Watch the seasons unfold with us.
1,260 followers |

Kerana Organic Wines

Premium Vegan 100% Organic Wines From Chile. Certified Organic by IMO Switzerland.
1,231 followers |

Crafty. Vegan. Pittsburgh girl. Yogi. Artisan. Painter. Treehugger. Activist. Rock hound. I ♥ my cat.
1,217 followers |

Shawnna Donop

Nature, outdoors, wildlife, sustainability, gardening, cooking, science, astronomy, green technology, work/life balance, good karma, and B&W cats.
1,203 followers |

Casey Trees

Casey Trees' mission is to restore, enhance and protect the tree canopy of the Nation's Capital.
1,194 followers |

Tim Jones

Writer (Men Briefly Explained, Anarya's Secret, Transported), editor (Voyagers), poet, blogger, climate change activist, fan of cricket, music and libraries
1,189 followers |

Jim Penson

Bluegrass musician, teacher. Writer. Single dad, nature lover, barefoot runner. I teach banjo, guitar, mandolin, and bluegrass jamming.
1,118 followers |

Karen California

Man belongs to the Earth, the Earth does not belong to Man
1,100 followers |

nature.com Boston

Follow us to find out about what's new on the Boston hub on nature.com blogs.
1,017 followers |

Robert Glenn Ketchum

#Conservation #photographer, preservation advocate, author and activist who likes to grow flowers. #NoPebbleMine! #LittleBearProd
967 followers |

treenation

Tree-Nation is the biggest social network dedicated to trees plantation for a better planet!
964 followers |

ClimateRescue

Our energy can stop global warming.
931 followers |

Joel Lawson

Comms., public policy, foreign affs., media & tech., women's rights, civil rights, LGBT rights, DC activism, photography. That's all...for now.
885 followers |

DC Grrl

I love DC, movies, music, pets & travel. I’m a copywriter, a graphic designer, and I try to live green. I work in the WaPo advertising department.
854 followers |

Tuckertown

Earth Inquiry LLC Cross Creek belongs to the wind and the rain, to the sun and the seasons, to the cosmic secrecy of seed, and beyond all to time.
852 followers |

emilyanne

namaste...
844 followers |

The Ocean Project

Daily ocean action tips!
775 followers |

Nora Kuby

20-something vegan high-raw foodie, photographer, chef, yogi, animal lover, music snob, Austenite, shopo/chocoholic, avocado aficionado & Planet ORNG citizen.
772 followers |

Gareth Guest

Life loving individual.
765 followers |

Catherine Toft

UC Davis professor of Evolution and Ecology. Ecoblogger and environmental educator.
758 followers |

Jennifer Santisi

Science writer/editor
753 followers |

Broken Wunderkind

professional sick person
730 followers |

karl

Solar power advocate in San Francisco
721 followers |

Eco Prophecy

Energy, Environment, Science, Pollution & Portents. Tweets by @OffGridGeek
641 followers |

Michael Scott

I am interested in helping people cut their energy bill and save the planet by using solar energy.
582 followers |

jim belcher

Editor of the blog CommunityCreatives.org Founder of Transition Orlando. Longtime facilitator/teacher of community and creativity. Active with Occupy Orlando.
549 followers |

GreenAdSource

Impact Your Business, Not The Environment. The source for eco-responsible promotional products that will help you leave a lighter environmental footprint.
531 followers |

Galelem

Tree hugger, human rights advocate, liberal, Elder Companion.
499 followers |

NRDC in the Gulf

This is @NRDC's account for our efforts in the Gulf region.
479 followers |

Eric

Used to drive a forklift, now I own my own internet marketing business.
405 followers |

Kathy Chamberlain

DC-area woman with a passion for the arts, nonprofits, reading, economics, urban devel & design, and exploring the world at large
319 followers |

Erica Dale Strzepek

New England USA native, #Artist, #WatercolorPainter, #NatureLover, living one day at a time
312 followers |

Janak Shah

Passionate about Enviroment Protection, Conservation of Natural Resources,Sustainable growh, Peace and Prosparity for habitat of planet.
307 followers |

Brendan

294 followers |

Terry Miskimmin

MD of Fremantle Timber Traders re environmentally friendly, quality recycled & reclaimed timbers | Mad Dockers supporter - Freo, heave ho!
289 followers |

Peter Koll Tamera

networking, peaceworker, humane sustainability - at Tamera Peace Research Center
234 followers |

Kris Wiltse

Artist and Illustrator
188 followers |

Lynn

http://about.me/lynnalong
141 followers |

Andrea Contreras

I love animals and being eco-friendly. I'm easy going and try to get along with everyone. I love walking, volunteering at the zoo, and just being me!
93 followers |

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