We can not change every think at once or in a short lapse of time. For that reason to transit to green building, we must incorporate green material step by step until we reach our goals, convince people of the benift of the use of these materails. The first indicator that I seggest is to indicate avaliability of green materials in your country, How many persons master technical use of these materials; The number of building 100% green compared to concretes ones.