Web resources
- Green Tourism
http://www.green-tourism.com/ - International Ecotourism Society
http://www.ecotourism.org/resources - Pay Per Nature View (WWF)
http://assets.panda.org/downloads/paypernatureviewphotos.pdf - Tourism in the UN Green Economy Report
http://www.slideshare.net/Ejido/tourism-in-the-un-green-economy-report-2012#btnNext - WWF Tourism
http://worldwildlife.org/travel