Understanding Cities

4. What year was the Woolworth Building in New York built?
5. Who is credited with the invention of the light bulb?
6. The _________ of the two main aquifers in New York was built in 1885.
7. A city that is in a constant state of flux is considered a __________________.
8. The two "post skyscraper" events which slowed and stopped urban building in the 1930's and 40's were World War 2 and __________________.
10. Cities Cities that are added onto as they neen more space are called ___________.
12. What percentage of Western Europe's population was killed in the 14th Century Plague.
13. The two technological advances that made skyscrapers possible are lighter and stronger steel beams and ______________.
14. What is used to digest nutrients out of sewage?

1. How many employees are needed to deal with London's sewage?
2. What did workers digging in London to build underground train systems what did the workers find?
3. What gas is given off by processing sewage?
6. What significant sewage technology was developed in the mid 19th century?
9. Who were the first people to move water in a systematic way?
11. How many thousand flushes per second are there in London?