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.
1619 Dutch ship brings 20 Africans to. Jamestown, Va., the first enslaved. Africans in the U.S. 1793 Eli Whitneyâs new cotton gin. increases demand for slaves. 1793 Congress passes Fugitive Slave Act, making it a federal crime to assist a. slave trying to escape. 1808 1865 Congress bans importation of slaves.