Learning from books and teachers is like traveling by carriage, so we are told in the Veda. But, the carriage will serve only while one is on the highroad. He who reaches the end of the highroad will leave the carriage and walk afoot.
What is now called 'green architecture' is an opportunistic caricature of a much deeper consideration of the issues related to sustainability that architecture has been engaged with for many years. It was one of the first professions that was deeply concerned with these issues and that had an intellectual response to them.