The present invention relates to a system comprising a structural unit erected on supporting means (support columns), wherein the structural unit is provided with: (A.i) one or more of optical fibre tubes, and (A.ii) one or more of optical fibre tube assemblies thereof and (B.i) one or more of optical fibre tubes, and (B.ii) one or more of optical fibre tube bundles thereof, wherein the optical fibre tubes and optical fibre tube assemblies thereof and the optical fibre tubes, and the optical fibre tube bundles thereof are capable of serving plurality of the purposes selected from the group comprising: (i) transmission of (allowing passage to) light to reach to land used for construction of the structural unit, and (ii) imparting additional structural strength to the structural unit and wherein the optical fibre tubes and optical fibre tube assemblies thereof are additionally capable of serving following purposes: (iii) transport of (allowing passage to) rainwater to reach to land used for construction of the structural unit, (iv) transport of (allowing passage to) dew to reach to land used for construction of the structural unit, (v) transport of (allowing passage to) air to reach to land used for construction of the structural unit so that the land used for the construction of the structural unit of the present invention is still available for the agricultural purposes because essential ingredients, i) ground space ii) sunlight iii) rainfall (or water supply) iv) air (or wind) v) dew required for the agricultural purpose are made available even after erection of the structural unit of the present invention.La présente invention porte sur un système qui comprend une unité structurelle érigée sur des moyens de support (colonne de support), lunité structurelle étant pourvue : (A.i) dun ou de plusieurs tubes à fibre optique et (A.ii) dun ou de plusieurs ensembles de tubes à fibre optique de ceux-ci (B.i) dun ou de plusieurs tubes à fibre optique et (B.ii) dun ou de pl
