What was the primary energy source for the United States in the early 1800's?

Name: What was the primary energy source for the United States in the early 1800's?
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Wood was the primary energy source for the United States in the early 1800's. Coal did not become a significant energy source until the mid-1800s, and oil was not discovered in the United States until the late 1800s. Hydroelectric power did not become a significant energy source until the early 1900s.

What Was the Primary Energy Source for the United States