.:~/^%&@##                                          ##@&%^/~:.
..:~/^%&@#                                          #@&%^/~:..
...:~/^%&@                                          @&%^/~:...
....:~/^%&                                          &%^/~:....
.....:~/^%                                          %^/~:.....
......:~/^     //                             //    ^/~:......
.......:~/     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~      /~:.......
........:~    ##  mass-production treehouse  ##     ~:........
.........:      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~     :.........
..........    //                             //     ..........
..........                                          ..........
..........   created in the twenty eighties as a    ..........
..........   cheap and open source way of dealing   ..........
..........   with constant floods and a rising sea  ..........
.........:                  level.                  :.........
........:~                                          ~:........
.......:~/ the "house" would consist of a stack of  /~:.......
......:~/^  floor modules, each a square of thirty  ^/~:......
.....:~/^%  six square meters. these could be made  %^/~:.....
....:~/^%& out of various materials such as carbon  &%^/~:....
...:~/^%&@   fiber or plastic, not necessarily the  @&%^/~:...
..:~/^%&@#           same for each floor.           #@&%^/~:..
.:~/^%&@##                                          ##@&%^/~:.
..:~/^%&@#  the house would be hung on a "mast", a  #@&%^/~:..
...:~/^%&@   ridged metal pole extending between    @&%^/~:...
....:~/^%& fifty and a hundred meters. a mechanism  &%^/~:....
.....:~/^%  within each floor would enable them to  %^/~:.....
......:~/^  climb up or down the mast, together or  ^/~:......
.......:~/              individually.               /~:.......
........:~                                          ~:........
.........:   the lowest floor would usually have a  :.........
..........  loading dock, a balcony/front door, and ..........
..........             various ladders.             ..........
..........                                          ..........
..........       //                        //       ..........
..........        ~~~~~~~~~~~~~~~~~~~~~~~~~~        ..........
.........:       //                        //       :.........
........:~                                          ~:........
.......:~/      ^ climate : housing : modular ^     /~:.......
......:~/^         ^ suburbs : open source ^        ^/~:......
.....:~/^%                                          %^/~:.....
....:~/^%&                                          &%^/~:....
...:~/^%&@                                          @&%^/~:...
..:~/^%&@#                                          #@&%^/~:..
.:~/^%&@##                                          ##@&%^/~:.