in history we're studying about the great population boom that took place in the U.S. between the 1820s and 1860s. Isn't it incredible how in 40 years places that had no europeans in sight became great cities. in 40! i'm thinking, what if in 40 from now some other new cities would appear just like that? seeing as how now we're facing pollution problems, resource shortage danger, ecology issues, we could build a whole new, ecologic city, with a nice modern design, and a well-thought architecture and infrastructure! or maybe seeing as how the economy is going to hit rock bottom, it's not the best time?