North Dakota sits on top of the largest oil discovery in at least a generation. This week the North Dakota Petroleum Council is celebrating the fact that the state is now pumping one million barrels of oil a day. This is an astonishing figure and has not come without costs. In another of my series of photos from my North Dakota trip, here are two photos of oil wells in the Bakken Formation. In the color photo, you can see natural gas being burned off as a waste product of the drilling. While burning natural gas byproduct of oil production was common in early drilling, it has become less prevalent as producers have sought and found ways to recover this valuable resource.