I've put together a list of people who I follow on twitter and I am sharing the list here. I have featured the ones below as a taster of the entire list as a whole. To follow the entire list on twitter just click on the link below.

STI's mission is to positively impact communities and travelers worldwide through sustainable tourism development that delivers measurable results.

We’re a charity helping local communities to realise their tourism potential, creating a fantastic place to visit for everyone and supporting the local economy

International Centre for Responsible Tourism Canada - promoting & developing the concept of responsible tourism in Canada
World Green Tourism @WGreenTourism
ADTA and EAD initiative to promote sustainable tourism globally - especially in the Middle East . Tweets news on the region and titbits from further afield.
Mary Mulvey @ecoireland
ADTA and EAD initiative to promote sustainable tourism globally - especially in the Middle East . Tweets news on the region and titbits from further afield.

Ireland only Ecotourism criteria approved by Global Sustainable Tourism Council 2012
Chitwan Jungle Lodge @ChitwanJungle
I'm Nistha Shrestha, Marketing Exec for Chitwan Jungle Lodge, a quiet little family-run lodge located deep inside the Chitwan National Park in Nepal.

I'm Nistha Shrestha, Marketing Exec for Chitwan Jungle Lodge, a quiet little family-run lodge located deep inside the Chitwan National Park in Nepal.

Traveler championed sustainable travel before it was cool and celebrates cultural and authentic journeys.

Founder of www.khanfousretreat.com, a bamboo retreat experience on the gorgeous Atlantic coast of Morocco, where sustainability and responsibility matter.

We're the only organisation in Europe actively campaigning on tourism & human rights issues. Our mission is to ensure that tourism always benefits local people

Joie de Vivre manages over 30 boutique hotels, restaurants and spas located in Calif. and Ariz. and is opening in Palm Springs and Chicago in Feb. 2012.

WE BELIEVE IN THE POWER OF TRAVEL TO EFFECT POSITIVE CHANGE...WE LIVE FOR EXCEPTIONAL MOMENTS...THE WORLD AWAITS!

French Marketer, loves life, people, nature, real food, travelling near & far. Keen to share small ideas for greener adventures just 1 little step at a time.

A directory of meaningful travel opportunities including volunteer work, jobs, teaching, conservation, eco / adventure trips & tours worldwide
Ethan Gelber @thetravelword
The travel blog of the WHL Group (www.whl-group.com), the largest local-travel company in the world, connecting mindful travellers to responsible experiences.

Dedicated to promoting ecotourism since 1990.

Applying responsible tourism principles to scuba diving, making a difference - one dive at a time! Kate Turner

Helping travelers find sustainable tourism destinations in Latin America and the Caribbean! Created by the Rainforest Alliance, a nonprofit organization.

The original sustainable travel Blog network. Make Travel Fair is about unleashing the potential of travel to educate, engage and inspire

GO GREEN ON THE ROAD!!Tweets and retweet to inspire to conserve local nature and cultural differences!
Himalayan Footsteps @Himalfootsteps
Himalayan specialists. Follow for adventure with altitude and attitude. Olly tweets news from Himalayas, ethical travel & travel tips.
Irene Lane @GreenloonsEco
Founder of Greenloons | educates & connects eco-conscious travelers with certified ecotourism operators & accommodations | aims to visit a new country each year
Ecotourism Australia @EcotourismAus
Ecotourism Australia is committed to growing and promoting ecotourism and other sustainable tourism experiences
Katie @QualityUnearthd
tweeting about anything that grabs my attention, eco-builds, yurts, retreats, quirky stuff and even, sometimes, QU holidays!
Muskoka Foundation @DoGoodAsYouGo
We equip&inspire a network of travelers to live the idea of use what you know, to do good as you go. Programs create skills, independence &sustainable change.

Himalayan specialists. Follow for adventure with altitude and attitude. Olly tweets news from Himalayas, ethical travel & travel tips.

Founder of Greenloons | educates & connects eco-conscious travelers with certified ecotourism operators & accommodations | aims to visit a new country each year

Ecotourism Australia is committed to growing and promoting ecotourism and other sustainable tourism experiences
tweeting about anything that grabs my attention, eco-builds, yurts, retreats, quirky stuff and even, sometimes, QU holidays!

We equip&inspire a network of travelers to live the idea of use what you know, to do good as you go. Programs create skills, independence &sustainable change.
If you think you can recommend any organisation who is worth adding, I'll happily add them.