To respond to growing demands for urban environmental planning and management expertise , UN-Habitat has been conducting capacity-building activities through a wide range of national training institutions in China , Cuba , Egypt , India , Nigeria , Peru , the Philippines , Senegal , Sri Lanka , Thailand , the United Republic of Tanzania and Zambia . UN-Habitat is spearheading the development of the Sustainable Urban Development Network ( SUD-Net ) , an innovative network focusing on promoting interdisciplinary approaches to sustainable urban development .