People who frequently take print out of web pages would have noticed this very often. You take a print out of a web page and you are expecting 5 pages to print out. Once the 5th page is printed, the printer keeps rolling and throws out a sixth page which contains nothing more than the URL of the page which you are printing. You just wrap the paper into a ball and throw it into the waste paper basket without second thoughts.
These wasted pages occur many times a day littering homes and offices around the world and wasting money, trees, and time.
GreenPrint eliminates wasteful pages in any printout automatically. GreenPrint’s patent-pending technology does this by analyzing each page of every document sent to the printer and looking for typical waste characteristics (like that last page with just a URL, banner ad, logo, or legal jargon).GreenPrint also incorporates an easy to use PDF writer, a fantastic print preview called GreenView, and a reporting feature which keeps track of the number of pages and the amount of money you have saved.
GreenPrint World is an ad supported free edition of the priced GreenPrint Home edition.
As per GreenPrint website, if all US households with a computer used GreenPrint over $6 billion would be saved a year.
I don’t know how far that is true, but if it really is, then GreenPrint can really make a huge difference if used by large number of people.