Design that serves multiple functions is efficient in its use of energy and resources including time and space. Heat from a cob oven bench can be used for 11 different things! When we can utilize natural outputs like heat, instead of simply letting it diffuse through the air, we get extra functions for free.
Learn more about multi-functional designs like carbon dioxide exchange between animals and plants in a greenhouse, sunken gardens for rain catchment, green roofs, upcycled building materials, and more. Urban areas are ripe with opportunity for multi-functional design. From wall spaces to window planters to balconies, there is a wealth of potential for permaculture design.