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.
Most slaves who were brought or kidnapped to the Thirteen British colonies which later became the Eastern seaboard of the United States were imported from the Caribbean, not directly from Africa. They arrived in the Caribbean predominantly as a result of the Atlantic slave trade.