2NLC academia adequate sustainable housing Africa ancestral land architecture archive Asia bibliography biodiversity Cambodia campus cities citizenship civil society climate change climate resilience communal communal land community finance constitution cooperation customary dryland ecosystems education EFN erosion ESJT GIZ green spaces gully housing human rights inclusive indigenous rights informal areas informal settlements informal settlement upgrading informal structures infrastructure journalism land land delivery land reform Laos livelihoods murd namibia nhag opportunities policy research rural sdfn Southern Africa urban urban development urbanisation Windhoek