San Francisco International Airport will soon be populated with kiosks where green, and presumably well-off, travelers can buy indulgences for their environmental sin of air travel. The machines give travelers a chance to buy carbon offsets by calculating their trip's carbon footprint, along with the cost of an investment necessary to reduce general environmental impact by the same amount.
Once the travelers pay, they get receipts telling them which projects they have sponsored. All you need is a credit card to save the planet!
Offsetting a trip to Europe would cost about $36, while a two-hour trip would only cost $4. Would you participate?