Delta Airlines, carbon offset options

"Delta, who became the first American airline to offer a carbon offset option, works in tandem with the Nature Conservancy to fund three separate projects around the globe. The first, which focuses on an area near the Tensas River in northern Louisiana, is expected to draw over 83,000 metric tons of CO2 from the atmosphere over the next 70 years—that's the equivalent of not consuming 9,339,485 gallons of gasoline. Another project, funded by Delta passengers, avoids the emission of over 445,000 metric tons of CO2 by purchasing forests in southern Chile that would otherwise have been converted for land use—the equivalent of not consuming 50,073,141 gallons of gasoline."