Stop the junk mail!

The numbers are out there.  How much paper the average American uses, how many trees have to be cut down to create all the paper products we use, how much waste we generate, environmental impact, etc., it's there for the finding.  Millions, billions, tons, acres, let's face it... unless every tree disappeared over night or a big pile of rotting paper showed up on the front lawn, the numbers don't mean much.  How much junk mail do we get in the mail box every day?  This we know.   No need for agencies to study how much paper is wasted to create it and how many trees have to be cut, no need for satelites to tell us how many trees are still around or for statisticians to extrapolate in how many years they will be gone.  We figured out the junk mail problems on our own, in words we understand: it's a LOT!
 
Having said that, for the numerically inclined and more objective individual, organizations such as the EPA and US Post Office have the stats.  The United States Postal Service (USPS) states in “The Household Diary Study: Mail Use & Attitudes in FY 2006.” March 2007, pp.1. that 100 billion pieces of junk mail are being delivered every year(1), about one third of mail delivered across the entire world (2).  It takes 100 million trees to manufacture the paper needed for this much mail, the equivalent to razing the Rocky National Park every four months.(3) How much of it is solicited?  Officially, according to the EPA, around 50%.  Unofficially, how much of it did you ask for?