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From colonial days, Pennsylvania was valued for its timber from thick forests. Soon, coal became a commodity. Anthracite coal is found in the eastern half of Pennsylvania. By the early 1700s, explorers went into western Pennsylvania, where Bituminous coal had formed. From the mid to late 1700s settlers mined bituminous--soft--coal for heat and use in factories during the 1800s. By the 1880s, citizens discovered oil in western Pennsylvania (north to south). Besides products of agriculture and livestock, timber, coal, and oil have been Pennsylvania's three primary Natural Resources.

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10y ago

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