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Oil and natural gas furnish about three-fifths of our energy needs, fueling our homes, workplaces, factories, and transportation systems. In addition, they constitute the raw materials for plastics, chemicals, medicines, fertilizers, and synthetic fibers. Petroleum, commonly referred to as oil, is a natural fuel formed from the decay of plants and animals buried beneath the ground, under tremendous heat and pressure, for millions of years. Formed by a similar process, natural gas often is found in separate deposits and is sometimes mixed with oil. Finding, developing, and extracting oil and gas are the primary functions of the oil and gas extraction industry. While some of these functions are done by the large oil companies, most are done by contractors working in the support activities for mining subsector, which is included in this industry.1
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1 (Source: U.S. Bureau of Labor Statistics)
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