A UPS delivery truck is seen in New York City March 5, 2014. United Parcel Service Inc, the world's largest courier company, said it would buy 1,000 propane-fueled delivery trucks and install 50 ... more 
A UPS delivery truck is seen in New York City March 5, 2014. United Parcel Service Inc, the world's largest courier company, said it would buy 1,000 propane-fueled delivery trucks and install 50 fueling stations in the United States as it expands its already-large fleet of alternative-fuel vehicles. REUTERS/Mike Segar (UNITED STATES - Tags: BUSINESS ENERGY TRANSPORT) less 
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Reuters | Photo By MIKE SEGAR / REUTERS
Wed, Mar 5, 2014 2:27 PM EST