12/31/13
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One of the greenest ways to ship packages and send mail is to use the United States Postal Service. With more than 200,000 vehicles on the road -- 25 percent of which are alternative fuel-powered, making it one of the greenest and leanest delivery systems in the country. But in many parts of the country, the USPS incorporates an even greener approach: walking. Thousands of postal workers hand deliver mail in cities and communities all over the country, making it a truly carbon neutral choice.