Shahrnevesht added that developing vertical green spaces has been followed by urban managers for a couple of years now. In this plan, vertical gardens are created using ascending plants on vertical walls and scaffolds. Such spaces have many applications. It is also good to create new horizontal green spaces in yards and by taking advantage of small greenhouses and dead spaces inside buildings such as window shelves and balconies.
Mohammad Mokhtari, managing director of Tehran Municipality’s Parks and Green Spaces Organization, says vertical green spaces have been added by 25 percent. Development of such green spaces can not only beautify general perspective of the city, but also help clean the air. Green spaces have developed along Modarres, Chamran, Yadegar-e Emam and Imam Ali (AS) highways. To develop urban green spaces and reduce pollution, people should cooperate with Tehran Municipality. Education and culture building will be quite necessary to promote use of vertical spaces at homes and in the city.
Based on available figures, vertical green spaces account for 40 percent of all green spaces in Germany. The figure is 20 percent in Japan and 25 percent in Canada. This method is not limited to advanced countries and dry countries like Sudan, Kuwait and Senegal use it. Experts maintain that a 23 cm green wall can keep out as much as 40 decibels of sound. When the thickness is 20 cm up to 50 decibel of sound can be kept out.