Our up-time characters are in Little Ice Age Europe now, and hence neither their experience with twentieth-century American agriculture nor their limited literature on twentieth-century European agriculture are a completely reliable guide as to what crops will grow where. The effect of the Ring of Fire on climate is also somewhat uncertain.
Airship lift depends on the difference in density between the lift gas and the ambient air, and thus in part on their respective temperatures. So . . .
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- The Grantville Gazette Staff