What is the key value proposition of sustainable homes?

What is the key value proposition offered by sustainable homes?

A) A sustainable home must be well located as well as energy efficient. Close to places of work, commerce and recreation. 

B) A high performance home must deliver an outstanding emotional experience. Design by engineers may function, but may deliver a poor emotional experience. Frank Ghery said this year that Architecture today is "pure shit". What makes your houses/condo better? 

C) A Sustainable Home is a Tesla - its luxurious, sophisticated, hot, fast and sexy. It is not a hippie hovel. 

D) After these things a sustainable home delivers health benefits and lower total cost of ownership.