not a whole lot to go on

i read a book  in the mid to late 1980's  

it's main character was a teen who lived on a planet where all the the other planets dumped their garbage

the garbage was hundred of feet deep

the people lived off of  scavenging

like i said not a lot to go on any ideas

from the back cover....

Kopra is a small asteroid, coated with unimaginable filth in all shapes and forms.  Its ihhabitants, too, are a dirty lot, clothed in soiled rags, underfed and hungry.  The garbage dump of the United Asteroid Belt Pleasure Worlds Federation, Kopra's sole function is to receive specially packaged waste materials from its sister asteroids.  Carefully avoided by Off-Worlders for centuries - the stench alone is enough to discourage anyone - Kopra suddenly becomes the object of extraordinary interest to Off-World government officials.  And from the moment they cautiously set foot on the asteroid, they are plummeted into an adventure as bizarre as it is exciting - filled with danger and plenty of unexpected surprises.

that might be it but i the plot doesn't ring a bell  

might just be my memory is bad