Global warming is a hot issue these days. The process is reversible; hence, we can no longer stop its existence but still, some means to lessen its effect can be done. One way of doing so is planting more plants that can ultimately help in reducing carbon dioxide in the air. Yet, with more lands being less arable and with the development of urban areas, the need to resort to some other means of farming has become indispensable. This has given birth to several such methods and one of them is creating green walls.
A green wall, also known as biowall and vertical garden, is a wall grown with vegetation and soil or any organic growing medium. The vegetation is permanently attached to the wall and is only maintained regularly. The wall can be free standing or part of a building. There are two main types of green walls: green facades and living walls. The former are made up of climbing plants growing directly on the wall or through specially designed structure. On the other hand, living walls are more complex in design. The modular panels are normally made of steel containers, geotextiles, irrigation systems, a growing medium and vegetation.
Apart from aesthetic value, green walls serve several functions. The vegetation on these walls can reduce overall temperatures of the building, very much helpful in urban environment. Plants have the ability to absorb solar radiation and re-radiation from roads and structures, thereby cooling the surrounding area. Moreover, these walls can be a means for water reuse since plants may purify partly polluted water by absorbing dissolved nutrients. Green walls are as well excellent way of utilizing empty and unused walls.
Hopefully in the future, common agricultural crops will be planted on green walls. An instant garden at home, now aligned vertically, will be a good source of nutrition for urban dwellers. Just imagine harvesting cabbages or tomatoes or spring onions on your walls, in the comfort of your own home.See what others have to think about "Green Walls".