Anthropogenic processes linked to large scale urbanization are acknowledged as major sources of global environmental change. Global urban growth is now mostly taking place outside the largest existing urban concentrations, in wider mega-regions of interlinked cities and urban corridors. This research applies remote sensing and GIS to compare urbanization dynamics and related environmental changes in four mega-regions in the two largest developing countries. Models of alternative trajectories will be developed to assess policies and institutions relevant to the regional dimensions of urbanization and its consequences. Stakeholder workshops, exchanges and participation in stakeholder and academic forums will further reinforce capacity building.