<http://schema.org/alternativeHeadline>
"Track your weekly carbon footprint using Foursquare"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2011/12/20/track-your-weekly-carbon-footprint-using-foursquare/?awesm=tnw.to_1CJpZ>