ADDIS ABABA UNIVERSITY GRADUATE PROGRAMMES COLLEGE OF NATURAL AND COMPUTATIONAL SCIENCES CENTER FOR ENVIRONMENTAL SCIENCE LANDSCAPE APPROACH, NON-CARBON BENEFITS AND INSTITUTIONAL ARRANGEMENTS FOR EFFECTIVE REDD+ IMPLEMENTATION IN ETHIOPIA By Sisay Nune Hailemariam A Thesis Submitted to Center for Environmental Science Presented in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Environmental Science Addis Ababa University Addis Ababa, Ethiopia March 2018