Reuters: Oil drillers in North Dakota's Bakken shale fields are allowing nearly a third of the natural gas they drill to burn off into the air, with a value of more than $100 million per month, according to a study to be released on Monday. Remote well locations, combined with historically low natural gas prices and the extensive time needed to develop pipeline networks, have fueled the controversial practice, commonly known as flaring. While oil can be stored in tanks indefinitely after drilling, natural...