
In 2010 the University of Wisconsin-Green Bay made headlines when they switched the default email font from Ariel to Century Gothic in order to save 30% ink when printing emails.
The move was part of their 5 year plan to go green and save money.
Source: http://www.dailyfinance.com/2010/03/26/university-thinks-the-right-font-could-help-save-the-earth/