Green design is an issue that a lot of public concern. In particular, its our contribution as  designers to reduce the damage  for our habitation  the earth. Green concepts can be applied with various ways.well,that today  100% green building is very difficult to realize, because of resources and the cost factor.
Because of that  in my opinion the green concept is more devoted to the
selection of materials that do not damage the natural state,
 the use of materials local building sustainable,
utilization of natural lighting, and natural air conditioning for the room  so that the use of ac or fan is not required.