This photo shows the Bakken oil fields from space at night, and the glow is nearly as bright as the lights of Minneapolis/St. Paul (via Mark Perry):
What’s causing the light? All the new people living in western North Dakota have expanded communities there, the oil rigs are light up brightly at night. Plus, all the gas flaring. Which isn’t a great thing. That’s a lot of natural gas going to waste.
Thankfully, there are works in progress to capture and use more of it, including a new natural gas power plant being built in the state to meet rising demand for electricity.