Passive Solar House Design for better energy efficiency. (example is for New Zealand) Please be aware that the angles may be different for the area you are located. Angles of the sun for Australia can be found http://www.ga.gov.au/geodesy/astro/smpos.jsphere
How Green Walls Work Illustration by Jason Treat, National Geographic. Many living wall systems also have built-in irrigation systems in which water is harvested at the bottom of the wall and recirculated back to the top.The types of plants on green walls differ, but can include grasses, vines, and other climbing plants—all of which must have strong root structures, Green Roofs for Healthy Cities'.