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.:-;$£#@## ## mass-production treehouse ## ##@#£$;-:.
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...-;;;£#@ created in the twenty eighties as a @#£;;;-...
.:-;$£#@## cheap and open source way of dealing ##@#£$;-:.
.:-;$£#@## with constant floods and a rising sea ##@#£$;-:.
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:-;$£#@### the "house" would consist of a stack of ###@#£$;-:
.:-;$£#@## floor modules, each a square of thirty ##@#£$;-:.
.:-;$£#@## six square meters. these could be made ##@#£$;-:.
.:-;$£#@## out of various materials such as carbon ##@#£$;-:.
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.....-;£## same for each floor. ##£;-.....
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.:-;$£@### ridged metal pole extending between ###@£$;-:.
.:-;$£#### fifty and a hundred meters. a mechanism ####£$;-:.
.....::;£# within each floor would enable them to #£;::.....
.:-;$£#@## climb up or down the mast, together or ##@#£$;-:.
.:-;$£#@## individually. ##@#£$;-:.
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.:-;$£#@## the lowest floor would usually have a ##@#£$;-:.
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.:-;$£#@## various ladders. ##@#£$;-:.
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