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.
Black slaves that were taken to America were mainly from the West African countries that have a coastline on the Atlantic ocean. In some cases slaves were captured from other countries that are further inland then sent away on boats from the coastal towns. Three countries where most slaves are known to have come from are Sierra Leone, Liberia and Ghana. Other slaves from East African countries like Mozambique, Tanzania and Congo were sent to Europe and Asia.