Woven beneath the waters of the Straits of Mackinac in northern Michigan are two oil and natural gas pipelines—and experts are concerned they are about to break. The pipelines, owned by Enbridge Inc., carry these natural resources beneath the Great Lakes from Wisconsin all the way to Ontario. Yet due to age and lack of maintenance, the pipes, pumping 20 million gallons of oil and natural gas daily, are at risk of bursting—and therefore polluting the drinking water of the neighboring 30 million Americans and Canadians.