When casting impressions in snow, the impression is first prepared by spraying a thin layer of snow print wax on the impression?

Uh, yes. That statement is true.

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The region of the united states where beef and hog production is prevalent is the midwestthere are 12 states in this area including  illinois,  indiana,  iowa,  kansas,  michigan,  minnesota,  missouri,nebraska,  north dakota,  ohio,  south dakota, and  wisconsin. all of these states are known for their meat and such products.