"the purpose of hazard-zone maps is to give accurate information on the type and frequency of volcanic eruptions and consequent volcanic and hydrologic processes that could impact a given area -- information vital to sound land-use planning."

in a summary, which question does the sentence answer?
a. who
b. why
c. when
d. where

The correct answer is C.
Say, don't you remember, they called me Al—
It was Al all the time.
Why don't you remember, I'm your pal—
Buddy, can you spare a dime?
Once I built a tower, up to the sun,
Brick, and rivet, and lime,

This excerpt shows that they don't care about him anymore now that his service has been done. He did what was needed for the country and now when he doesn't have things to do anymore they abandoned him.