This improves the quality of the building’s internal climate, making it healthier – so much so as to achieve drastic reduction of the “Sick Building Syndrome” (sbs), notorious in North European countries and in the usa. and without energy content and the various types of environmental impact, i.e.: _the greenhouse effect _destruction of the ozone layer _water acidification _eutrophication (i.e. excessive plant growth in bodies of water caused by chemical nutrients) _formation of photochemical oxidants _waste production and recycling.