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.
In fact, slaves were lodged at the White House far past its construction. Jefferson was the first to bring his slaves â a dozen of his household servants from Monticello â to 1600 Pennsylvania. After Jefferson, Madison brought slaves from his Virginia estate.