A globe of cities by Gil Friend | Oct 23, 2008 | Uncategorized | 0 comments 19.20.21. is an intriguing and well designed site looking at “the rise of supercities as the defining trend of the 21st century” 19 cities in the world with 20 million people in the 21st century Tweet Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.
