What is vertical gardening ?

Vertical gardening is a type of urban gardening that is especially suited to tiny spaces and may be used to decorate the walls and rooftops in a variety of styles. This is a different approach to gardening that allows to grow plants in a vertical environment. There is very little horizontal area for outdoor gardening due to intensive urbanisation. Green walls absorb hot gases in the air, lowering both indoor and outdoor temperatures and resulting in a healthier indoor air quality as well as a more attractive environment.