A residential neighborhood sits adjacent to a large oil refinery in Baton Rouge, Louisiana. Owned by ExxonMobil, this facility is the fourth largest of its kind in the United States and the 12th largest in the world, with an input capacity of more than 502,000 barrels per day. This refinery is one of many industrial plants along the Mississippi River between Baton Rouge and New Orleans, an 85-mile stretch known as "Cancer Alley" because of the abundance of cancer cases that have occurred there.