The United States Postal Service (USPS) is the greenest way to send a letter or package. Think about it: The postal worker is already going to stop by your house on their daily route, so you can help reduce emissions by handing your package to your carrier instead of driving it to the post office (the USPS even has over 7,000 walking routes where mail is delivered on foot by their workers, for even more emissions reduction). Likewise, your package will be delivered by a truck that was on its way to the recipient anyway, instead of a private carrier like UPS or FedEx making a special trip.
ANDREWS MCMEEL SYNDICATION