Um... this last dreams bring to my mind new ideas... like, for example: how can someone make a house or apartment self-sustainable of services, like water supply, electricity, fire or hot to cook, etc... and still be a normal house in a normal city... and one by one the ideas begin to emerge...
1) Air... Practically free :-)... but it could be very interesting know where it is coming from...
2) Water... Once I saw on Discovery Channel a program about how the astronauts live in the space and one of the topics was the water, the solution is water filtering & recycling machines... The idea may come well from there ...
3) Earth... feeding... well, this is a challenge... required studies to see how much space is needed to crop or the minimal space, but hydroponic and airponic are good documentations and references, sure, we can't force each apartment must be independent of this, we could make a crop supply a whole building.
4) Energy... Electricity... Interesting subject, fortunately, at this time we are in the era of the clean-energy-sources, the wave of the green-electricity, and this is a average to this project because there is a huge menu in front of us and the best part is that we can eat many options of the menu at the same time... we can use many different energy sources at the same time to supply the house or apartment. e.g. We can have a solar panel & fuel cell at the same time...
5) Fire... Fuel to cook... Usually is obtained by the same sources of oil, as a natural gas, but I saw once in Discovery Channel a program about how obtain methane by some kind of swamp's weed, very particular, wherever is this swamp-weed, there is a very powerful smell (I don't want write details), the scientists discover that most of this smell is methane. and plus, the methane can also be obtained by the natural decomposition of organic matter. Anyway, the fuel to cook is not the only way to cook, the hot to cook also can be obtained with electricity.
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