....,-†=£#                                          #£=†-,....
...,-†=£#@                                          @#£=†-,...
..,-†=£#@#                                          #@#£=†-,..
.,-†=£#@##                                          ##@#£=†-,.
..,-†=£#@#                                          #@#£=†-,..
...,-†=£#@     ††                             ††    @#£=†-,...
....,-†=£#      -------------------------------     #£=†-,....
.....,-†=£     ##  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 =        £=†-,.....
....,-†=£#                                          #£=†-,....
...,-†=£#@                                          @#£=†-,...
..,-†=£#@#                                          #@#£=†-,..
.,-†=£#@##                                          ##@#£=†-,.
..,-†=£#@#                                          #@#£=†-,..