...biological ingredients such as soaps, detergents, etc. Greenhouse Gases Gases such as water vapor (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulphur...
http://www.adventuretravel.biz/glossary.asp
...of carbon dioxide from the atmosphere through 'gold standard' forestry. Future Forests calculates the level of carbon dioxide (CO2) produced by various activities and provides "offsets" to balance this out, and make that activity Carbon Neutral...
http://www.avis-europe.com/content-153
...example on a trip to India, each passenger is responsible for releasing nearly 2 tonnes of the global warming gas Carbon Dioxide (CO2) into the atmosphere. Many AITO operators support ‘carbon balancing’ initiatives. A number of organisations...
http://www.aito.co.uk/corporate_TipsForTravellers.asp
... Latest newsletter » Carbon Dioxide and you Understanding CO 2 emissions Human activity generates carbon dioxide (CO2), which one of the main contributors to global warming. Turning on the gas at home, driving a car, or flying...
http://www.unravelit.com/about_carbon_offsetting.html
The Carbon Dioxide Information Analysis Center (CDIAC) is the primary climate-change data and information analysis center of the U.S. Department of Energy (DOE).
http://cdiac.esd.ornl.gov/home.html