calling is one of the most expensive cities in the world the financial services have attracts millions of workers and the cramped living conditions take their toll says architect vicky chan. if you look around people like you can see a lot of people smiling you know. generally kind of unhappy one in seven people actually has mental illness here and cause they're stressed out at the office. and so sometimes it is not so much about the physical environment it's also like the mental part of it. how to make cities more livable places in the future vicki chan focuses on green living bringing nature back to the concrete jungle making building sustainable and energy efficient the architect founded his business with a small team he has an office in new york and one here in hong kong.