growing our house

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it is last night i just listening to the BBC podcast , i heard someone talk about growing building like plant , it is not just growing but grow our houses very quickly , almost overnight , instead of relying on conventional building techniques. this would at a stroke eliminate the pollution created by the building industry . but what if these new "organic " house started to behave like weeds? somehow it is not true at present , but bring us new idea ,with rapidly growing population fewer and fewer avilable shelter there are.