The parts of the United States that have higher populations of dairy cows are in the West and northern states.
Milk has moved away from cities between 2001 and 2011. Red areas indicate less milk in 2011 than 2001, green areas mean more and a buff color designates a neutral milk region.
Almost every region where you see a dark red area indicating a sharp decline in production has a large and growing population center nearby.
As many of you will notice, this continues the reversal of some patterns that von Thünen observed and put in his famous agricultural model.
Questions to Ponder: Why did milk used to need to be produced close to the cities? Why is the old pattern changing now? How is this changing regions?