What we have here is an immense and startlingly new oil and gas field — nighttime evidence of an oil boom created by a technology called fracking. Those lights are rigs, hundreds of them, lit at night, or fiery flares of natural gas. One hundred fifty oil companies, big ones, little ones, wildcatters, have flooded this region, drilling up to eight new wells every day on what is called the Bakken formation. Altogether, they are now producing 660,000 barrels a day — double the output two years ago — so that in no time at all, North Dakota is now the second-largest oil producing state in America. Only Texas produces more, and those lights are a sign that this region is now on fire … to a disturbing degree. Literally.