Go Green Travel Center - Q & A, travel tips, destinations, top trips, budget travel, and how to be a 'green' commuter, independenttraveler.com

Flying With Cleaner Air in Mind - air travel, considered a necessity of modern life, creates carbon dioxide emissions and ecologically conscious travelers are seeking ways to offset the damage, such as contributing to organizations that calculate the impact and then do something like planting trees to compensate. Read the pros and cons of such plans and check out several for yourself; Nick Easen of CNN mentions these companies: Trees for Travel, Future Forests, Climate Care, Dutch Business for Climate, and Germany's 550ppm, edition.cnn.com

"How to See the Planet and Save It at the Same Time" - Sascha Segan of Frommer's writes about several of the "big 'retail' carbon offset providers in the U.S." as well as tips for less polluting travel, frommers.com; see also "A Briefing on the World of Sustainable Travel and Ecotourism" by the Frommer's staff 4/3/07

Responsible Travel : The World's Largest Collection of Responsible and Ecotourism Holidays - this company claims the trips they promote enhance the 'good' side of tourism for both the environment and the local communities they visit--you can search by destination or by interest (i.e. walking trips, adventure holidays, etc.); they have reviews, a shop, travel tips, and an ezine, responsibletravel.com

Co-op America : National Green Pages - this organization suggests you make arrangements through and with businesses that are "green" as well as offering tips for travelers, coopamerica.org

"Green" Hotels Association - listing of hotels that subscribe to various earth-saving philosophies as well as environmental products, tips, and more, greenhotels.com

Planeta : 2007 World Travel Directory - bills itself as a global journal of practical ecotourism; readers can find out about ecotourism in general and about tour companies and trips in specific, planeta.com

EscapeMaker.com : Make your escape through the net! - features car-free getaways and "green" travel, escapemaker.com

Travel Companies Tackle Global Warming  - MSNBC contributor Rob Lovitt describes the trend toward trying to offset the global-warming emissions caused by driving or flying and some of the confusion over and pitfalls of these plans, msnbc.msn.com