#1

EdwardNorton Edward Norton 130,581 followers (2 on this list)
Bio The main reason for doing this, on all levels, is to raise money for an outstanding conservation effort that I'm involved with.
Location New York
Web http://www.maasaimara...

#2

EcoInteractive EcoInteractive 81,703 followers (14 on this list)
Bio Eco Preservation Society: Inspiring Action, Empowering People,Connecting Communities & Transforming the Planet through Conservation, Reforestation & Education
Location Costa Rica
Web http://unhub.com/EcoI...
Other lists:  environment, nonprofit

#3

denversolarguy Viking Services 45,196 followers (5 on this list)
Bio Everything related to alternative energy, solar, wind and geothermal
Location Denver, CO
Web http://vikingmservice...
Other lists:  alternative-energy, energy, oil-gas, renewable-energy

#4

HelpAnimals Help the Animals 37,871 followers (7 on this list)
Bio Help needy pets and wildlife Ƹ̵̡Ӝ̵̨̄Ʒ I'm also: @oceanechoes @spaceastro
Location World.
Web http://theanimalrescu...
Other lists:  activism, cats, dogs, environmentalist

#5

Eco_Costa_Rica EPS of Costa Rica 34,858 followers (4 on this list)
Bio Eco Preservation Society of Costa Rica: Eco Travel Supporting Conservation and Reforestation in Costa Rica. Making a Difference
Location Costa Rica
Web http://EcoInteractive...

#6

EcoPreservation Eco Preservation Soc 23,181 followers (15 on this list)
Bio Eco Preservation Society: Conservation, Reforestation and Education. We bring it together. Get conected, Get Involved, Make a difference.
Location Costa Rica / Seattle / Chicago
Web http://ecopreservatio...
Other lists:  education, environment

#7

TheOilDrum The Oil Drum 22,619 followers (6 on this list)
Bio A web-based, interactive energy, peak oil and sustainability think tank facilitated by the nonprofit 501(c)(3) Institute for the Study of Energy and Our Future
Location The World
Web http://theoildrum.com
Other lists:  green, nuclear, oil-gas, sustainability

#8

NWF National Wildlife 21,520 followers (19 on this list)
Bio The National Wildlife Federation works to inspire Americans to protect wildlife for our children's future. Staff updating:@climateguru @ksuzj @starfocus
Location Washington, DC
Web http://www.nwf.org
Other lists:  biology, environmentalist, green, nonprofit

#9

EcoExploration Eco Preservation 20,185 followers (2 on this list)
Bio Eco Preservation Society: Eco Travel Supporting Conservation and Reforestation in Costa Rica. Make a Difference
Location 

#10

nature_org Nature Conservancy 15,913 followers (16 on this list)
Bio The Nature Conservancy welcomes you to its official Twitter site! We're a leading conservation organization working for people and nature.
Location 32 countries on Planet Earth
Web http://nature.org
Other lists:  environment, nature, nonprofit

#11

EcoFamilyTravel Eco Family Travel 15,301 followers (2 on this list)
Bio Eco Preservation Society: Eco Travel Supporting Conservation and Reforestation in Costa Rica. Make a Difference
Location Costa Rica
Web http://ecointeractive...
Other lists:  family

#12

EcoJourney Eco Preservation Soc 12,798 followers (1 on this list)
Bio Eco Preservation Society: Eco Travel Supporting Conservation and Reforestation in Costa Rica. Making a Difference
Location Costa Rica
Web http://www.ecointerac...

#13

africafreak Michael Theys 12,629 followers (9 on this list)
Bio A young guy who loves travelling, discovering new horizons and meeting new people! Curious by nature! Has had the chance to live in Africa for almost 24 years!
Location Belgium
Web http://www.africafrea...
Other lists:  adventure-travel, africa, animals, birds, nature, photography, safari, travel, wildlife

#14

CRexpeditions Eco Preservation Soc 11,447 followers (1 on this list)
Bio Costa Rica Adventure Travel by Eco Preservation Society: Eco Travel Supporting Conservation and Reforestation in Costa Rica. Making a Difference
Location Costa Rica
Web http://www.ecointerac...
Other lists:  adventure-travel

#15

starfocus Danielle Brigida 10,015 followers (25 on this list)
Bio I'm a wildlife geek with a job at the National Wildlife Federation. Tweet'n 4 @NWF. Interests: environment social media nature green technology sustainability.
Location Washington, DC
Web http://www.nwf.org/Ne...
Other lists:  biology, green, nature, nonprofit, nptech, pr, socialmedia, wildlife

#16

chrisbaskind Chris Baskind 9,300 followers (20 on this list)
Bio I write about the Environment, Green and Simple Living, and bicycles. My sites are More Minimal and Lighter Footstep.
Location Pensacola, Florida
Web http://chrisbaskind.c...
Other lists:  eco, environment, frugal, green, minimalist, minimalists, simplicity

#17

TheGreenPlanet The Green Guy 8,261 followers (3 on this list)
Bio I go crazy when I see others trash something that could be recycled. I am always in need to learn more about new green technologies. I’ll share some tips here.
Location Boston, MA
Web http://bit.ly/11LUUl

#18

humane_rights Human Rights 6,830 followers (6 on this list)
Bio Human And Animal Rights Together (H.A.A.R.T) #EndangeredSpecies, #Rainforests, 10 Online Newspapers, #GlobalWarming, #Sustainability, #EcoingGreen...
Location Portland, Oregon, USA
Web https://www.facebook....
Other lists:  animal-rescue, animal-welfare, animals, eco, environmental, extinction, green, rainforests, wildlife

#19

jmarks Mark Schrag 6,752 followers
Bio internet marketer, golfer, Loves Charlevoix MI Owner Seasons At Home Parties
Location East Lansing, MI
Web http://www.bigticketd...
Other lists:  renewable-energy

#20

nationaltrust National Trust 6,463 followers (5 on this list)
Bio Conservation charity, protecting historic houses, gardens, woods, coast, countryside... and opening them for the public to enjoy. Chief tweeter Debbie Smith
Location Swindon, UK
Web http://www.nationaltr...
Other lists:  charity, environment, nonprofit