Vinca major L. is a Mediterranean species, hemicryptophyte, cultivated in Romania as ornamental plan on walls or cliff arrangements. Due to its biologic characteristics it can be easily cultivated on roofs and harmoniously associated with species Arabis caucasica L. for the setup of green roofs. A species native to the mountain areas of Asia and Northern Africa, Arabis caucasica L. (syn. A.albida Stev.) has been introduced and naturalized in almost all of Europe, including Romania, and at the present time it is part of the ornamental assortment of alpine gardens insuring, through their color and flowering abundance the specific décor in the summer period. The paper has the purpose of analyzing the influence of some culture systems on the ornamental potential of Vinca major plants 'Variegata' L. și Arabis caucasica 'Deep Rose' L. For this purpose we have analyzed the influence of the culture location and the used substrate on the plan growing and development abilities. Experiences were based on the installation of roof and field culture, as well as on the use of three culture substrates of different compositions: a 1-forest soil; a 2-Novobalt peat mixture (43%), coconut fiber (30%), composted bark (23%), alginate (4%); a 3blonde peat (40%), brown peat (30%), sand (10%) and forest soil (20%). Planting the Vinca major 'Variegata' and Arabis caucasica 'Deep Rose' plants in different culture systems and different types of substrates has determined a differential behavior, with better results, for both species, in case of the substrate comprised of: Novobalt (43%), coconut (30%), composted bark (23%), alginate (4%). Taking into consideration the specifics of the Vinca sort, it is highlighted that it had a remarkable evolution which convinced me to recommend it in landscape arrangements made on roofs and terraces.

The roots of this study are generated by the problems of plastic waste accumulations: insufficiency of storage spaces, storage costs and outgoings of plastic waste recycling, recovery, decomposition or reprocessing. The paper develops and details a modular prototype, for multifunctional territorial use, offering non-polluting and aesthetic possibility of plastic waste storage. The progress in the related fighting pollution areas have been approached, such as waste management through ecological design and the widespread use of green walls new techniques. The construction techniques are designed and calculated in order to be easy feasible from the technical and costs point of view. The proposed prototype has a metallic resistance structure in which compressed bales of unprofitable plastic waste (PET and plastic bags) are incorporated. The exterior surface of this structure is aesthetically designed, dressed with decorative-treated pieces of wood, also with vertical and horizontal boxes with selected plants, resistant to pollutants and climate, requiring a minimal maintenance. Regarding the multifunctional utility, the modular elements can be used as: anti noxious, noise, wind and snow barriers protecting various areas and traffic routes; enclosure or masking elements for various types of territorial sites; vertical support for territorial public advertising/information boards. For reasons of environmental sustainability, this proposal should be only an interim ecological solution, until efficient and low cost decomposition solutions for all kind of plastic waste will be found.