Berlin. I need 20 characters so I'm just writing this.
If you're talking about G.I. generations then the answer is about 4
Correct answers
a. changing a school lunch program
<span>b. hiring new police officers and firefighters
c. planning when to repave a road
d. hiring new teachers for a school</span>
Bamboo plants
Sun dried mud
Earthbags
John Quincy Adams, hope this helps