Non-renewable resources are resources for which there is a limited supply. The supply comes from the Earth itself and, as it typically takes millions of years to develop, is finite. Non-renewable resources can generally be separated into two main categories; fossil fuels and nuclear fuels.
But there were pockets of the North on the eve of the Revolution where slaves played key roles in the economic and social order: New York City and northern New Jersey, rural Pennsylvania, and the shipping towns of Connecticut and Rhode Island.
By capturing local leaders, the Spanish reached the Apalachee where corn and shelter were common. By now, the greed for wealth was the major motive for the conquistador. In the spring of 1540, DeSoto's forces with their herd of hogs headed northwestward into Georgia, never to enter Florida again. For the next three years, DeSoto would explore the frontiers of Georgia, South Carolina, Tennessee, Alabama, Arkansas, and Mississippi.