Carbon offset's cheaper than you'd think

[ed - I bought a $379 round trip ticket from Newark, NJ to Seattle. Apparently, I can offset my carbon for about seven bucks. What does that buy, iron filings for an algae bloom?]

Leave the World a Better Place™ - Carbon Offsetting Option Continental has partnered with Sustainable Travel International (STI), a non-profit organization that supports global climate protection and environmental conservation. STI offers customers the option to make a contribution to offset their carbon footprints for travel on Continental. All contributions are paid directly to STI. Continental does not receive any portion of any contribution. Sustainable Travel International calculates that to offset your amount of CO2 from this itinerary, you may contribute $7.10 or another amount.