At self-serve kiosks at San Francisco International Airport, travelers can now pay a fee to offset the carbon dioxide emissions of their trip. The idea is that the money goes to stop emissions somewhere else or even to a forest that can absorb the carbon. But will patrons get what they pay for?
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Full story at http://www.npr.org/templates/story/story.php?storyId=113280463&ft=1&f=1001
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