PetroChina passes ExxonMobil in 2011 crude oil production

PetroChina passes ExxonMobil in 2011 crude oil production USA TODAY "There's a lot of anxiety in China about the energy question," says energy historian Dan Yergin. "It's just growing so fast." While PetroChina sits atop other publicly traded companies in oil production, it falls well short of national oil companies ...