Sustainable concrete

Concrete road culverts can be used as the structural sections for a house. There is many sections that may be used. Stand up concrete panels can be used as retaining walls on the berms simplifying construction. These sections can be bought in and placed using a crane, earthen floors are a way of reducing concrete. Concrete is not as bad as some environmentalist want you to believe, used in engineered amounts concrete can be reduced to the minimum. I see where they pour concrete into the ground like there is no end, engineers design or over design places and you would think they got a percentage from the amount of concrete in the job.
The photo below is a photo borrowed from the Sovereign Concrete Product's of Ballarat site.
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If concrete is the be used to walk on only, then two inches is enough with wire mesh in the pour.  I read about the sustainable regrowth timber and this stuff is not that green in fact I would say its not environmentally friendly. Concrete can last hundreds of years and it wont burn down. I don't know weather I have said this before but hanging the furniture from the roof is a good idea. I will demonstrate the culverts in a future post and show photos of models that I will make. I would also like to recommend Rex Roberts engineered house book. Its a good read, I do not get paid for any recommended book or article in these posts. I do not get paid from the concrete industry. Cheers Stewart