URBAN ENVIRONMENTAL PROBLEMS: SOCIAL AND ENVIRONMENTAL INJUSTICES IN SOLID WASTE MANAGEMENT IN KINSHASA, THE DEMOCRATIC REPUBLIC OF CONGO BY NZALALEMBA SERGE KUBANZA THESIS Submitted in fulfilment of the requirements for the Degree of DOCTOR OF PHILOSOPHY in GEOGRAPHY AND ENVIRONMENTAL STUDIES at the UNIVERSITY OF THE WITWATERSRAND SUPERVISOR: PROF. DANNY SIMATELE Ethics Clearance Number: H14/10/30 September, 2016