This is the FINAL DRAFT Main Report for the Strategic Environmental Assessment (SEA) of the Cuando River Basin (CURB), shared by Angola, Botswana, Namibia and Zambia (Figure E.1). Strategic Environmental Assessment (SEA) is "a framework" to assess the environmental and social implications of development policies, plans and programmes (PPPs) (Organisation for Economic Cooperation and Development - OECD, 2006). Also, SEA is increasingly used in a geographical area (e.g. the CURB) where there is no specific PPP, but rather an incremental increase in developments and resultant cumulative impacts. Where a SEA is done early and where there is good integration between it and plan-making process, SEA has proven to be effective as "a plan shaper" (that helps make PPPs more sustainable), but may also be regarded as a "fine tuner".