Vertical green walls are architectural features that incorporate living plants into vertical structures, often used for aesthetic purposes or to improve air quality. They can be seen in urban environments, on buildings, and in gardens. These walls can include a variety of plant species, from herbs and flowers to vines and shrubs. They are designed to be self-sustaining and can be either free-standing or attached to walls. Vertical green walls are a form of green infrastructure that contributes to urban biodiversity and sustainability.