some countries also report more specific objectives for some parts of the housing sector objectives for the social rental sector for example include reducing its construction and running costs denmark improving its regulation the czech republic or enabling a more diverse range of providers new zealand the phenomenon is significant in other oecd and key partner countries as well around of the urban population lives in slums in in india and brazil in indonesia and south africa and in mexico see un millennium development goals database due to rapid urbanization in developing countries the number of slum dwellers is projected to grow in the coming years unhabitat and eradication of urban slums by has been included by the united nations among the targets of the un millennium development goals target of goal