here's one reason: when you move north, the amount of sun you get during differe...

		Upvoter33 on June 18, 2019 \| parent \| context \| favorite \| on: Canadian permafrost thaws 70 years earlier than pr... here's one reason: when you move north, the amount of sun you get during different times of the year changes a lot. Some crops won't naturally be able to move north.