Why biofuels like ethanol are not the solution to the looming energy crisis:
The nation’s corn crop is fertilized with millions of pounds of nitrogen-based fertilizer. And when that nitrogen runs off fields in Corn Belt states, it makes its way to the Mississippi River and eventually pours into the Gulf, where it contributes to a growing “dead zone” a 7,900-square-mile patch so depleted of oxygen that fish, crabs and shrimp suffocate.
