What's the difference between common fences in China and those abroad?

Throughout the global cities, the biggest difference between China and foreign countries is the fence. According to incomplete statistics, the total length of the walls of public units (excluding houses) in China exceeds 5 million kilometers, which can circle the earth 125 times, and the area exceeds 1 100 square kilometers, and the corners on both sides cannot be used, which is 3350 square kilometers. ……

The so-called "fences" in some foreign cities, or elegant railings, hollowed-out barbed wire, or interesting "green fences": buildings are looming in the "fences", which neither damages the overall beauty of the urban environment nor hinders the public's vision space.

The so-called "green fence" is to "build a wall" with plants instead of bricks, stones or reinforced concrete. This vibrant green fence not only occupies a small area, saves materials and funds, but also has remarkable effects in greening and beautifying the city, improving the environment, reducing noise and dust, purifying the air and adjusting the temperature, which is quite popular among people.

Brazil's "plant wall" is one of the most unique urban green wall buildings in the world. In Brazil, people see green fences made of hollow bricks with gum and fertilizer attached to them, and then grass seeds are planted on them. As long as the climate is suitable, grass will grow out of it and cover the walls green. This kind of plant wall not only has aesthetic value, but also can reduce noise and air pollution.

In major cities in Brazil, even buildings are often green and grass is swaying. At first, a special "bio-brick" was used for exterior walls. If the wall is properly sprayed with water at ordinary times, it can be green all year round, heat and sound insulation, absorb carbon dioxide and purify the air in the community. In Brasilia, the capital of Brazil, the per capita green space is nearly 100 square meter, ranking first in the world. Brazilian law stipulates that construction projects without greening design may not be constructed; After the construction of a construction project with greening design, if there is exposed soil on the ground, it will not be accepted. So, when the house is finished, the lawn, flower bed and hedge are also finished, finished. Every 10 apartment building forms a "square street", that is, a residential district. Surrounded by a large green plant belt, including shrub walls, small gardens and evergreen lawns, it plays a role in filtering air and preventing noise. Brasilia, a new capital that was established only at 1960, has no historical value at all. However, 1987 has been designated as "human cultural heritage" by the United Nations. In addition to square of the three powers's ingenious design and novel urban style, Brasilia has become a model of a modern new city because of its excellent greening and harmonious coexistence between people and the environment. 1990 Curitiba, the capital of Paraná, Brazil, was named "Ecological Capital" by the United Nations. Although the urban population soared from 500,000 after the war to 6.5438+0.5 million, the per capita green area increased from 0.5 square meters to 54 square meters. The citizens put the energy of building the fence into greening and created a thick "green wall". ……

China has built walls for thousands of years. Although it has the function of security and demarcation, it has little effect today with advanced technology. If you want to attack it, if you want to steal it, you don't care about a wall. Breaking through the walled area can not only save land, but also save landscape, beautify and purify the urban environment. Replacing brick walls with green walls is the need of the times, opening up, beautifying our homes, protecting the ecological environment and improving living conditions.