Clic on “Super Cities: New york city”
The program is not entirely on the website but they might show it again on tv.
The video was showing all the underground life of Manhattan, some historic innovation, and the problem of Water into the city.
The conclusion was : in less than a century Manhattan might be under water, so there is a crazy really expensive project to stop the water.
Then they spoke about the future function of Manhattan : Less and less people will have to go to work into a building, they will be abble to stay home with new technology so Manhattan would become more and more touristic. There will be less traffic and a better public transportation system.