Eco-conscious travelers can now fly carbon neutral.

The idea of individuals offsetting their personal carbon dioxide releases is gaining popularity, especially in England, and more so in this country in the past few years.

One relatively new way to be carbon neutral involves commercial air flights.

Airplanes emit carbon dioxide at the rate of 1 ton per passenger and some who are concerned with the contribution of CO2 to global warning say that a jet plane's seven-mile high release is even more potentially harmful than releases from ground zero.

Travelocity, an Internet travel agent, offers travelers a chance to be carbon neutral.

Travelocity customers can donate $10 to $40, depending on the length of their flight, and 100 percent of the donation is passed on to The Conservation Fund.

The fund has been used to reforest more than 5 million acres of public land with native trees and plants, which absorb CO2 and turn it into oxygen.

The idea of going carbon neutral has been taken up by such icons as the Super Bowl.

Super Bowl XXXIX, in Jacksonville, Fla., was the first to be carbon neutral. Promoters estimated how much CO2 would be produced by Super Bowl activities and donated money toward the planting of thousands of trees to offset that carbon.

The Rolling Stones' United Kingdom tour in 2003 was carbon neutral. Promoters planted one tree for every 57 fans, or 2,800 trees for the 160,000 fans that traveled to the concerts.

Internet search engines, like Google, are a handy way to look for carbon neutral opportunities.

A company called The Carbon Neutral Co., offers carbon-neutral opportunities for driving, flying and in-home living.

It sells products like the Magno-Fuel, which is affixed to a vehicle fuel line, causing oxygen molecules to become embedded into fuel molecules for better combustion and a 15 percent fuel savings.