“The North American energy revival is primarily the result of so-called unconventional sources of energy — like shale oil and shale gas across the United States, oil sands in Canada and deepwater production in the Gulf of Mexico. In the last five years, the United States and Canada combined have become the fastest-growing sources of new oil supplies around the world, overtaking producers like Russia and Saudi Arabia.”
Weiterlesen: http://www.nytimes.com/2012/04/11/business/energy-environment/energy-boom-in-us-upends-expectations.html