Take a look at this video at the end of the slideshow. The video pretty much explains why we do what we do, by keeping things out of the landfill.
On another note...the woman here lives in Venice, but her trash gets dropped off near Eagle Rock. http://www.huffingtonpost.com/2011/07/05/lucy-walker-director-of-w_n_845120.html#s261436&title=Scholl_Canyon_Landfill