Outside, Environment,eco
CNN Breaking News
CNN.com is among the world's leaders in online news and information delivery.7,607,487 followers | Follow
National Geographic
Since 1888, we've traveled the Earth, sharing its amazing stories with new generations. Official Twitter account of National Geographic.1,901,034 followers | Follow
NatGeoTraveler
Official account for National Geographic Traveler: Nobody knows this world better. Updates posted by @SeaFox4, @AndreaLeitch399,768 followers | Follow
Ree Drummond
I'm The Pioneer Woman. Desperate Ranchwife. Mother of Four. Lover of Butter. Amen.306,341 followers | Follow
Oxfam International
Int'l confederation of 17 like-minded organizations working together & with partners around the world to bring about lasting solutions to poverty & injustice.264,960 followers | Follow
National Geographic
Follow us for the latest on what's happening at the National Geographic Channel in the U.S. Questions and comments welcome!219,773 followers | Follow
Maureen Evans
Tiny recipes serving 3-4, condensed by @Maureen, author of the Eat Tweet cookbook. Complete glossary: cookbookglossary.pbwiki.com209,656 followers | Follow
TreeHugger.com
Links, Ideas and Conversation from the TreeHugger hive mind, the latest in modern green.169,432 followers | Follow
World Wildlife Fund
WWF works to build a future in which human needs are met in harmony with nature. Follow World Wildlife Fund and share your love of all things wild.157,619 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.119,380 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 @julkosch95,419 followers | Follow
National Wildlife
National Wildlife Federation works to inspire Americans to protect wildlife for our children's future. Staff updating: @starfocus @rarewildlifeguy @ksuzj89,388 followers | Follow
PlanetGreen.com
PlanetGreen.com offers practical, everyday tips on how to live a greener lifestyle. We offer actionable advice across a variety of topics: green made real.87,767 followers | Follow
Guardian Environment
Green news, comment & more, run by the environmentguardian.co.uk team, inc @james_randerson & @adamvaughan_uk & @dpcarrington86,587 followers | Follow
Earth Hour
Dare the World to Save the Planet - Create an I Will If You Will challenge to take your action beyond the hour.76,988 followers | Follow
SolarFeeds
Official SolarFeeds Account. We have 370+ contributors covering solar news, gadgets, and stocks. We also love electric vehicles and smart grids75,728 followers | Follow
NYT Green Blog
Green: A Blog About Energy and the Environment from The New York Times63,720 followers | Follow
Arthur Koch
Scuba Diver and Underwater Photo Geek. I have a great love for the ocean and saving her from the bipeds. Sign up for our newsletter. http://bit.ly/cKvAKk61,999 followers | Follow
Michael Sprague
Water holds a kind of magic. It calms us. It lifts us. Ultimately it sustains us.50,166 followers | Follow
WWF Climate Savers
Finding workable, practical solutions to the problems posed by Climate Change and Global Warming.48,650 followers | Follow
Stephen Duggan
Travel Writer, Green Travel Guru, Everything u need to know on Travel Ecotravel Hotels Destination Attractions Theme Parks Cruises Rail Bike Things2see and do!40,404 followers | Follow
Sierra Club
Since 1892, the Sierra Club has been working to protect communities, wild places, and the planet itself.39,039 followers | Follow
Bob Richards
Space entrepreneur. Orphan of Apollo. A Founder of the International Space University, Singularity University, SEDS, Odyssey Moon & Moon Express (CEO).38,143 followers | Follow
Sierra Magazine
Environmental news, lifestyle tips, and free-ranging opinion from the editors of Sierra magazine. Our mission: Explore, enjoy, and protect the planet.38,050 followers | Follow
Earth News
Wildlife, Nature, Science & Environment news from around the world. 'No 1 environmental news Twitter' - The Guardian + BBC news Live Updates.36,257 followers | Follow
National Parks News
National Parks Conservation Association protects our national parks for our children & grandchildren. Retweets or links do not constitute endorsements.34,975 followers | Follow
The Ecologist
The Ecologist - setting the environmental agenda since 1970. Like us on facebook: http://www.facebook.com/TheEcologist33,590 followers | Follow
National Zoo
The Smithsonian's National Zoo demonstrates leadership in animal care, science, education, and sustainability.27,853 followers | Follow
Paul Williams
Film maker, BBC Wildlife TV: Making 'Monsoon' series on SE Asia & India. Writer, Photographer. Facebook: http://on.fb.me/ammonoid Creator of @Earth_News24,731 followers | Follow
Yale Environment 360
Opinion, Analysis and the Latest Environmental News - A Publication of the Yale School of Forestry & Environmental Studies.23,983 followers | Follow
theclymb.com
The Clymb is a private member network for dedicated outdoor enthusiasts, athletes, and professionals. Member pricing on the planet's most sought-after brands.23,169 followers | Follow
Sierra Trading Post
Get a #GR8Deal on outdoor gear, sporting goods, clothing, footwear & home accessories. Save 35-70% off retail prices. #OutdoorsyGoodness - http://stp.me/hub22,876 followers | Follow
Greg Mortenson
Central Asia Institute co-founder / Three Cups of Tea & Stones Into Schools co-author / Let's Educate Girls & Change The World22,819 followers | Follow
one green planet
Welcome Green Monsters! One Green Planet is your online guide to making conscious choices that help people, animals and the planet.22,204 followers | Follow
Philippe Cousteau
Social entrepeneur, TV Host, CNN special correspondent, explorer, member of legendary family and CEO of EarthEcho International and Azure Worldwide.21,768 followers | Follow
Conservation Intl
Conservation International - an environmental organization working with partners in 40 countries around the globe to protect nature for the benefit of people.21,111 followers | Follow
David Roberts
Seattleite transplanted from Tennessee; now blogging for Grist about energy politics. Climate hawk, deficit dove.20,624 followers | Follow
Nat Geo Live
National Geographic explorers, photographers, filmmakers, and journalists share stories from the field at events worldwide.20,027 followers | Follow
NOAA Ocean Explorer
NOAA Ocean Explorer is an educational Internet offering for all who wish to learn about, discover, and virtually explore the ocean realm.19,984 followers | Follow
J McIntire-Strasburg
Blogging a Greener World since 2003. The J is Jeff...19,339 followers | Follow
greentweet
Chelsea Green Publishing's GreenTweet - Green Links, Tips, and Information. Check us out on @chelseagreen, too!18,558 followers | Follow
David E. Guggenheim
Marine scientist, conservation leader, sub pilot, speaker, educator, author. Sr. Fellow at The Ocean Foundation. Host, The Ocean Doctor http://oceandoctor.org17,951 followers | Follow
Nat Geo PR
Official Twitter feed of the National Geographic Society public relations team17,928 followers | Follow
backcountrycom
Backcountry.com is where you – the passion-addicted, performance-is-the-rule outdoor fanatics – go to research, review and buy the gear you need to get after it17,328 followers | Follow
SeaTurtleFoundation
The Sea Turtle Foundation is working to make sure there are Turtles for Tomorrow, for everyone to enjoy. Help us Save the Sea Turtles @ seaturtlefoundation.org16,176 followers | Follow
Leave No Trace
Conservation Education nonprofit committed to the responsible enjoyment of the outdoors.15,118 followers | Follow
NG Adventure
Dream it. Plan it. Do it. Keep up on adventure news, athletes, gear, explorers, and more. Updates are posted by @maryannepotts, http://on.fb.me/GFaTdE14,516 followers | Follow
Eileen Green
I research & publish reliable information on how to live healthy & green for Eco Evaluator. Connect with me on FB http://on.fb.me/qUDzlo12,915 followers | Follow
CalAcademyofSciences
Explore an aquarium, planetarium, and natural history museum all under one living roof.11,360 followers | Follow
Rocky Mountain Inst
Founded in 1982, Rocky Mountain Institute is a research and consulting non-profit that drives the efficient and restorative use of resources.10,842 followers | Follow
Fabien Cousteau
Eldest grandson of Jacques Yves Cousteau, Fabien continues the legacy and mission of exploration, media production, environmental advocacy and plantafish.org10,142 followers | Follow
Scripps Oceanography
Scripps Institution of Oceanography is one of the oldest, largest, and most important centers for marine science research, graduate training, and public service9,983 followers | Follow
GreenLivingIdeas.com
Official Twitter home for Green Living Ideas - part of Important Media9,815 followers | Follow
Wildlife SOS India
I'm Kartick Satyanarayan, co-founder of Wildlife SOS, India and a TED fellow. We work to make a difference to the planet!9,698 followers | Follow
Andrew R. Lewin
Founder, Speak Up for the Blue, Marine/Coastal Spatial Ecologist, conservationist, and blogger9,413 followers | Follow
Roz Savage
Ocean Rower, Author, Motivational Speaker, Environmental Campaigner9,356 followers | Follow
Post Green
News about the environment, climate change and green living from @WashingtonPost. Tweets by @greglinch. Visit http://wapo.st/wpgreen & http://wapo.st/wpclimate8,957 followers | Follow
Save Our Seas
The Save Our Seas Foundation sponsors marine projects around the world in the areas of conservation, awareness, research and education.8,718 followers | Follow
End Water Poverty
We campaign against the global water and sanitation crisis. Make your voice heard through End Water Poverty. Tweets by Jen, Sarah and Olivier.8,582 followers | Follow
DavidMaxBraun
7,782 followers | Follow
NatGeoKIDS
Follow us for the latest on National Geographic Kids. Our goal is to excite kids about their world. Feel free to send any comments/questions our way!7,616 followers | Follow
Josh Bernstein
International explorer, educator, environmental advocate, TV host, producer, photographer, author, world traveler, cave diver, cigar aficionado.7,552 followers | Follow
The Ocean Project
We work to advance ocean conservation in partnership with zoos, aquariums, and museums around the world.7,529 followers | Follow
Green Hour
Tweeting tips about how to get outside and play more often! National Wildlife Federation's Be Out There campaign supports Green Hour.7,276 followers | Follow
Ecochickie
Starre Vartan runs eco-chick.com & authored The Eco Chick Guide to Life. A problogger and eco expert, she's been featured in the NYTimes, Elle & Whole Living.7,239 followers | Follow
GoGreenTravelGreen
Go Green Travel Green: Tips for sustainable travel and green living. Exploring the world, trying new foods & being green.7,192 followers | Follow
Hiking Lady
HikingLady.com: Hiking, backpacking, camping, trekking, and outdoor adventure!6,997 followers | Follow
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 @myEARTH3606,821 followers | Follow
Ocean Champions
The only political voice for the ocean. We help elect pro-ocean candidates & work with them to drive great ocean policy. Tweets from Mike, Chris & the crew.6,617 followers | Follow
Deborah Berebichez
A physicist with a deep passion for communicating science to the masses. Secondary life as philosopher and actor. Made in Mexico.6,587 followers | Follow
Mireya Mayor, Ph.D.
Host of Nat Geo Wild, Explorer/Wildlife Expert Expedition Africa,Author Pink Boots & A Machete,Emmy Nominated Reporter, Speaker & Former NFL Cheerleader6,498 followers | Follow
Buy Biochar
We advocate & supply soil biochar, biocarbon & thermal sustainable carbons.Offering sustainable, renewable replacements for fossil fuel. 100+ tons available now6,478 followers | Follow
Avital B. Andrews
Writer, reader, magazine editor, Army wife, traveler, environmentalist, vegetarian, marathoner, media nerd, wannabe psychologist, lover of big ideas6,380 followers | Follow
gCaptain.com ⚓
The top-visited maritime and offshore industry news website in the world.6,375 followers | Follow
Seth Haber
Founder and CEO of Trek Light Gear. The daily adventures of running a small biz and enjoying life. Life is better in a hammock!5,928 followers | Follow
Colin Beavan
I'm the author of No Impact Man. I'm a writer, activist, speaker and now candidate for Congress!5,869 followers | Follow
Sailors for the Sea
Educates and engages the boating community in the worldwide protection of the oceans. Galvanizing the boating community around ocean conservation.5,270 followers | Follow
BlueLivingIdeas.com
Blue Living Ideas is the ultimate resource for info and news on Earth's most precious resource: Water. Visit our sister site @GreenLivingIdea as well5,045 followers | Follow
Duncan Green
From Poverty to Power blog updates by Oxfam's Head of Research, Duncan Green. About to start tweeting properly in vain effort to overcome technophobia.4,926 followers | Follow
Fun Green Tips
Good news & fun stuff about living green from The Fun Times Guide to Living Green. See how to help the environment while having FUN at the same time!4,784 followers | Follow
Celine Cousteau
Documentary Filmmaker- Exploring social, cultural, and environmental issues through the human relationship to the natural world.4,761 followers | Follow
AFreeMansLife
biodiversity climate environment water forests energy csr politics human rights4,295 followers | Follow
Victoria Kamsler
Ex-Princeton environmental ethicist, Co-founder of Skybase (@solarflight), Chief Research Officer at Katerva (@katerva)4,256 followers | Follow
A.T. Conservancy
The Appalachian Trail Conservancy aspires to connect the human spirit with nature – preserving the delicate majesty of the Trail as a haven for all to enjoy.4,222 followers | Follow
Tracy Benham
Health-Fitness-Adventure Advocate! (@TravelFit) Exercise/Sport Physiologist, Producer. Sports, Health, Fitness, Activities, Outdoors http://plusya.com/she3,947 followers | Follow
GreenTravelHub
Feel good about green travel! We donate 20% of the proceeds from every trip to green non-profit groups!3,815 followers | Follow
Matt Gibson
Writer, editor & digital photog. Adventurist, activist & outdoor enthusiast. Lit snob, tech geek & armchair economist.3,738 followers | Follow
WHOI Media Relations
Woods Hole Oceanographic Institution (WHOI) is the world's largest private, nonprofit ocean research, engineering and education organization.3,733 followers | Follow
Miles Grant
Progressive politics, environmental policy, climate science, community activism & baseball watching. Opinions are my own. Unauthorized. Unprofessional. Etc.3,722 followers | Follow
Climate Counts
Climate Counts is a NH-based nonprofit aimed at bringing consumers and companies together on climate change3,459 followers | Follow
Altrec.com
Your source for reviews, premier customer service & 100% satisfaction guarantee on the planets best outdoor gear & apparel. Lifetime returns, no questions asked3,370 followers | Follow
Jill & Stacie
Maker of Mom Maps: The iPhone and Android app that finds kid friendly locations on-the-go!3,290 followers | Follow
UT Oceans & Seas
The RSS feed for The Urban Times' SEA & OCEANS articles. Save the blue planet.3,165 followers | Follow
Alexia Nestora
Blogger, Volunteer and Adventure Travel Industry Consultant, lassocommunications.com3,081 followers | Follow
Debi Huang
My blog is all about helping connect kids & nature in L.A. & beyond. 2012 Superoo for @Trekaroo family travel. Volunteer @NatureRocks Ambassador.3,026 followers | Follow
Katie Spotz
Adventurer. Speaker. Safe water activist. Rowed 3000 miles across the Atlantic Ocean becoming the youngest to do it and lots of other adventures.2,863 followers | Follow
Chesapeake Climate
The Chesapeake Climate Action Network is the first grassroots, nonprofit organization dedicated to fighting climate change in Maryland, D.C., & Virginia.2,812 followers | Follow
Healing Waters
We provide safe water solutions in communities where poverty is compounded by contaminated water.2,698 followers | Follow
Kelly Jo Gould
Senior Web Producer for the Sierra Club - Find out about national and local campaigns:2,693 followers | Follow
Fabien Cousteau
Stimulating marine education and restoration initiatives around the world.2,543 followers | Follow
Toxic Soup
Doc film about everyday folks fighting to protect their air, water & blood from pollution ft. @billclinton, @RFKjr + @jennyfrommtv. As seen on @freespeechtv2,487 followers | Follow
Glacier Outdoor
We strive to provide the most comfortable fishing gloves, hunting gloves, sun gloves, sun hats and accessories possible. Hang out with us here to learn more.2,476 followers | Follow
Smoky Mountains
Smoky Mountains National Park Official Nonprofit Partner Of Great Smoky Mountains National Park Since 1953. Cades Cove. Free photos, trip planning.2,256 followers | Follow
What Time Place
Interesting topics and places about relaxation in different countries all over the world.2,171 followers | Follow
Backbone Media
Backbone Media is a PR and media strategy firm specializing in the outdoor and active lifestyle markets2,150 followers | Follow
Kimberly Button
Kimberly Button is an author, freelance journalist, TV correspondent, founder of greenWell, traveller, and speaker - www.kimbutton.com2,134 followers | Follow
Jodi Kendall
Mom, Writer, Traveler, SCBWI Member. Check out my work with the Nat Geo Channel, Nat Geo WILD, Wanderfly, ABC News, Pregnancy & Newborn Magazine & more.2,060 followers | Follow
oceans initiative
Oceans Initiative: Science for the Sea. Non-profit that conducts conservation-minded research on marine wildlife. Tweets by @erinashe & Rob Williams.2,055 followers | Follow
nico danan
I curate www.oceanminds.com where fish get their news! I am a digital jack of all trades, mostly a chocoholic who believe in mermaids.2,053 followers | Follow
GlobalBasecamps
Sustainable travel resource, specializing in unique boutique hotels and eco-lodges. Dedicated to inspiring, empowering and simplifying independent travel.2,035 followers | Follow
Deborah deMoulpied
We are now BONA FIDE Green Goods. Please follow us @bonafidegreen. Check out our very cool new website www.bonafidegreengoods.com, with 27 eco icons to shop by1,969 followers | Follow
EarthShare Oregon
We connect Oregonians to the environmental causes they care about. Tweeted by Meghan H. & Aurora O.1,920 followers | Follow
Subaru/IMBA TCC
The Subaru/IMBA Trail Care Crews have taught sustainable trailbuilding practices to 150,000 people since '97. #TCC_East:Morgan&Steve #TCC_West:Jenny&Jake1,891 followers | Follow
Frank Wall
Hiker, bushwalker and outdoor lover. Co Author of Food to Go with great recipe ideas for the outdoors. Welcome and please drop by and say hello!1,825 followers | Follow
Malcolm Wright
The deep is my home And the sky an enigma I dreamt I had wings1,773 followers | Follow
EcoUsable®
Makers of Ech2o™, the world's 1st environmentally safe stainless steel filtered water bottle!1,683 followers | Follow
Katie Keenan
Interactive Marketing Manager, Music Lover, Foodie, Yogini, Bike Commuter. Former Web Editor of Ode Magazine. Start2Sustain.com1,624 followers | Follow
Amanda Little
Author of POWER TRIP: The Story of America's Love Affair With Energy1,601 followers | Follow
Blue Legacy
Follow Alexandra Cousteau and Blue Legacy on Expedition Blue Planet: North America as we explore critical water issues across the US, Canada, and Mexico.1,325 followers | Follow
John Easterling
Founder of @AmazonHerbCo. Rainforest Conservationist, Explorer1,249 followers | Follow
AccuTerra - Josh
Outdoorsman, active hiker, camper, skier, kayaker and mountain biker with a love for cool new gadgets, iPhone apps, and GPS exploration.1,243 followers | Follow
R Scott Jones
I help protect our National Conservation Lands & write about national park roadtrips, simplifying my life, technology, football, while conversing w Phx friends.1,240 followers | Follow
The Ocean Registry
Discover & protect our world's oceans and waters at TheOceanRegistry.com!1,211 followers | Follow
Colin McDonald
San Antonio Express-News' environment and water reporter Colin McDonald1,018 followers | Follow
James Tucker
Discovering methods to succeed through user research and testing data that can be used as both business intelligence and creative inspiration.737 followers | Follow
Cameron Martindell
http://offyonder.com Freelance adventure travel & expedition writer, photographer, videographer & inspirational speaker. Asst. Editor at Elevation Outdoors Mag.567 followers | Follow
Pocket Ranger
Pocket Ranger® is an innovative, free mobile app to help guide users through America's state parks. Map It! Discover & explore.547 followers | Follow
Julie Lawson
environmental activism (@anacostiaws) / nonprofit communications (@ComVis)496 followers | Follow
Getaway Earth
Holiday rentals from owners that care about presenting their holiday homes in the most attractive way possible453 followers | Follow
Great Outdoors
America’s Great Outdoors was created to help Americans develop a plan to create, expand and better protect America’s shared outdoors spaces.394 followers | Follow
Nicole Ghio
Enviro activist focused on climate, oil, energy, clean air, international finance and coal. Sierra Club policy and organizing liaison. All tweets are my own.393 followers | Follow
Eric Rohlffs
Addicted hiker, adventure tour guide, work-out junkie, Kauai lover, nature photog...Aloha to all!391 followers | Follow
donna jannine
Zimmerman/Edelson Inc. Accounts Manager-oversees corporate, municipal & education clients; plays integral role in daily public relations operations of the firm356 followers | Follow
Geoff York
Hello- I am the Head of Species Conservation for WWF's Global Arctic Program. I have spent the last 13 years studying polar bears.256 followers | Follow
Project Niu
STEM & ocean education for K-12 through satellite-tracked message in a bottle sensor devies.229 followers | Follow
Neil Hamilton
Geographer, strategic analayst, and arctic advocate. Can leap small ice flows at a single bound.223 followers | Follow
SierraClub Lox Group
The Sierra Club Loxahatchee Group is one of seventeen local Sierra groups in Florida. We serve Palm Beach, Martin, St Lucie and Okeechobee counties.41 followers | Follow
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