KEY POINTS
  • Democratic presidential contenders Elizabeth Warren, Bernie Sanders and Kamala Harris have all advocated plans to ban the fossil fuel extraction process that has catapulted the U.S. to becoming the world's largest producer of oil.

ABU DHABI — Fatih Birol, executive director of the IEA (International Energy Agency), told CNBC that a ban on fracking as proposed by some Democratic presidential contenders would have "major implications" for the U.S. energy industry.

"Just banning this would not be good news, not only for Americans but for Europeans," Birol told CNBC's "Squawk Box Europe" during the World Energy Conference on Monday.