One Watt, One Year, One Dollar estimates that leaving a 100 Watt bulb on for a year costs $100 & generates 1/2 ton of CO2 emissions.
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The USPS Household Diary Study estimates that in 2007 U.S. households received 150.9 billion pieces of mail, and sent 21.2 billion pieces.
Domestic mail to & from households was almost 80% of total mail volume in 2007. Thats 27.5 pieces per household sent & received each week.
The US Postal Service delivered 212 billion pieces of mail in FY 2007 – a decrease of almost 1 billion pieces from 2006.
Serving a nation containing 5% of the world’s population, the US Postal Service delivers over 45% of all of the world’s mail.
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