The Bakken Oil Field Boom in North Dakota

Rancher Donny Nelson walks near a drilling rig on his land. The oil is needed, but the state isnt enforcing pollution rules, he says. (Michael S. Williamson/THE WASHINGTON POST)

Rancher Donny Nelson walks near a drilling rig on his land. The oil is needed, but the state isnt enforcing pollution rules, he says. (Michael S. Williamson/THE WASHINGTON POST)

KEENE, NORTH DAKOTA – JULY 08: Rancher Donnie Nelson doesn’t necessarily trust the oil companies who are drilling on his land. He has some well rigs on his property (background) but is cautious and not sure how much more he wants to let them use his land further.The areas around Williston, North Dakota are experiencing a boom in oil related work, thus driving up the cost (and availability of) of housing. (Photo by Michael S. Williamson/The Washington Post