There are nearly three million miles of oil and gas pipelines in the United States. Most are small-diameter gathering or distribution lines, but there are more than a quarter-million miles of both large oil and natural gas transmission lines. Oil and gas combined currently provides over two- thirds of the country’s energy needs. Development of new resources in shale fields across the country in the past decade has increased supply and reduced the cost of domestic oil and gas, making the United States nearly energy independent.
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