At the beginning of the century, most people lived in rural areas. [1] [1] http://www.un.org/esa/population/publications/WUP2005/2005wup.htm http://www.un.org/

At the beginning of the century, most people lived in rural areas. [1] [1] http://www.un.org/esa/population/publications/WUP2005/2005wup.htm http://www.un.org/esa/population/publications/WUP2005/2005wu...