What is the germ theory


Assignment:

1. Why was construction of the National Road so important to the young Amencan nation?

2. How did John McAdam's roads differ from the Roman roads?

3. How did the federal government help finance the Construction of the transcontinental railroad?

4. What new technologies were important in the history of bridges?

5. What is the "germ theory" and how is it important to the history of water treatment?

6. Why did the Romans use elevated aqueducts instead of pipes to water treatment?

7. What are combined sewers?

8. One reason that some infrastructure is preserved by society is that society finds it beautiful. Predict the inflrastructure on your campus that will be preserved for 100 more years, in part because of its beauty.

9. Which of the Grand Challenges for the 21st century do you believe is most important? Why? Which challenge do you believe to be the least important? why? What challenge do you believe should be added to the list? Why?

10. New infrastructure may be needed in the near future to allow the "refueling" of electric vehicles, Should the public sector provide this infrastructure, or should the private sector? Explain your reasoning.

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