One big bunker under each city.....
The world's cities may be overcrowded, and the suburbs that surround them may be choked by unchecked sprawl, but there's plenty of undeveloped space. It's right at your feet….. underground. You won't hear much talk of it outside of specialized engineering circles, but we're at a tipping point... Over the next 10 years these techniques will be used to hollow out space beneath the world's great cities. http://www.wired.com/wired/archive/11.04/suburb.html
Beneath the ancient city of Beijing, an underground city of definite proportions has already begun to emerge. There are factories, stores, guesthouses, restaurants, hospitals, schools, theaters, reading - rooms, a roller skating rink, a grain and oil warehouse, and a mushroom cultivation farm. These underground production and service facilities cover a total area of 850,000 square meters and make use of more than 1,000 anti-air raid structures.
Monteal has the biggest underground city in the world. 20 miles of shopping malls, hotels, banks, offices, museums, concert halls, universities, seven metro stations, two commuter train stations, a bus terminal and the Bell Centre. There are more than 120 exterior access points to the underground city. Some 500,000 people use the underground city every day, especially to escape the traffic and/or Montreal's harsh winters and hot summers.
They dug railways, roads and footpaths, sewers, buried rivers, and most recently, bomb shelters. Today, there is a veritable subterranean city beneath the streets of London.
There has been a program on history channel all week about ancient underground cities.
I was amazed at the places that had underground cities dating back thousands of years that very few people knew existed. One in Edinborough, Scotland, several in Turkey and open to tourists. I can’t help but wonder if history is repeating itself. Has all this been done before? We would have no trouble surviving all the terrible things that we’ve been discussing here if we built these underground cities.