...~=;†*##                                          ##*†;=~...
..~=;†*###                                          ###*†;=~..
.~=;†*####                                          ####*†;=~.
..~=;†*###                                          ###*†;=~..
...~=;†*##                                          ##*†;=~...
....~=;†*#     ;;                             ;;    #*†;=~....
.....~=;†*     ===============================      *†;=~.....
......~=;†    ##  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 †        #*†;=~....
...~=;†*##                                          ##*†;=~...
..~=;†*###                                          ###*†;=~..
.~=;†*####                                          ####*†;=~.
..~=;†*###                                          ###*†;=~..
...~=;†*##                                          ##*†;=~...