How did some southerners contribute to industrial growth in the region

Historically, textbooks have taught that incompatibility between northern and southern economies caused the Civil War. The industrial revolution in the North, during the first few decades of the 19th century, brought about a machine age economy that relied on wage laborers, not slaves.

permafrost layer, it exists beneath a layer of soil, rock or sediment.

answer; they burn down the bushes and trees;