Poster designed for "Do the green Thing".
Every day people print a lot of different things, most of that paper is used just for a few hours (or minutes) and then it’s thrown away.
When I have some paper on my desk that I don't need anymore I always use the other side of the page to print something else or for my sketches.
I try to avoid printing as much as I can downloading tickets on my phone, or reading news online not to waste paper.
The printer is not an animal that needs to be fed.