Recoverable domestic natural gas proved reserves 2001-2013: U.S. Energy Information Administration, Form EIA-23L, Annual Survey of Domestic Oil and Gas Reserves
Energy jobs: Bureau of Labor Statistics, Monthly Labor Review, Feb 2014
State-level oil and gas extraction-related Gross Domestic Product: Bureau of Economic Analysis, Regional Economic Accounts data
Energy imports: U.S. Energy Information Administration, Monthly Energy Review
Wellhead truck generation: Truck Traffic Volume Increases Projected to Result from Unconventional Gas Well Development (UGWD) in Maryland; Maryland Department of Environment
Rural truck crashes: The Social Costs of Fracking – A Pennsylvania Case Study; Food & Water Watch report
Railroad capacity: Association of American Railroads, U.S. Rail Crude Oil Traffic factsheet