More petroleum and natural gas was produced in the United States than in any other country during 2020 (a trend that began in 2014), despite year-on-year declines from the record-high production in 2019. U.S. petroleum and natural gas output in 2020 totaled 66.9 quadrillion British thermal units (quads), which was more than both Russia’s 45.5 quads and Saudi Arabia’s 26.5 quads of petroleum and natural gas production.