Green Wall 

A green wall is a wall partially or completely covered with vegetation that includes a growing medium, such as soil. Most green walls also feature an integrated water delivery system. Green walls are also known as living walls, Bioboards, biowalls, ecowalls, or vertical gardens.

Such walls may be indoors or outside, freestanding or attached to an existing wall, and come in a great variety of sizes. As of 2012, the largest green wall covers 2,700 square meters (29,063 square feet or more than half an acre) and is located at the Los Cabos International Convention Center.
Green walls have seen a recent surge in popularity. Many Iconic green walls have been constructed by Institutions and in public places such as Airports and are now becoming common, to improve the aesthetics. 

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Green Roof

A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage and irrigation systems. Green roofs serve several purposes for a building, such as absorbing rainwater, providing insulation, creating a habitat for wildlife, increasing benevolence and decreasing stress of the people around the roof by providing a more aesthetically pleasing landscape, and helping to lower urban air temperatures and mitigate the heat.