INDUSTRIAL WASTE MANAGEMENT PRACTICES IN ADDIS ABABA: A CASE STUDY ON AKAKI - KALITY INDUSTRIAL ZONE, ETHIOPIA A THESIS SUBMITTED TO SCHOOL OF GRADUATE STUDIES, ADDIS ABABA UNIVERSITY IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE IN ENVIRONMENTAL SCIENCE BY GETACHEW TESSEMA TEKU June 2006 Addis Ababa _________________________________________________________________________ Addis Ababa University School of Graduate Studies Environmental Science