I recently made travel arrangements on Travelocity. At check-out, I noticed an option to “Go Zero” by donating $10 to offset one person’s carbon dioxide emissions for a flight, a one night hotel stay and one day car rental. The Conservation Fund will plant trees to zero out your emissions. I ended up not buying it for lack of any real information on the website. Many people apparently have questions about flying green because I found this article about Travelocity’s and Expedia’s carbon offset options.