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.
On the African coast goods from Britain were exchanged for slaves-slaves were held in slave factories on the west coast of Africa. This could take around 4-8 months trading. Slaves were then shipped across the Atlantic â The middle passage 40-69 days.