It is valuble because it keeps steel and other alloys from corrosiverust
The decline of Detroit Michigan was due to the collapse of
the auto industry. The big manufacturers
such as General Motors, Chrysler and Ford began transferring their operations
outside the area. Smaller manufacturers
began to such down leaving many workers unemployed. New technology, taxes and increased
automation also contributed to the decline.
Decrease pesticide use
<span>develop "cleaner" pesticides
increase organic farming</span>
I think it is the Prime Meridian
